Species List - North America

Current Number of Valid, Extant North American Species [Not Including Multiple Subspecies, Nomina Dubia (dub.), or Recently Extinct Species]: 653 (CAN: 329, GRE: 1, MEX: 152, USA: 566)

This list has been compiled and is maintained by Mayfly Central, Purdue University. If you have questions about interpreting the list, see How to read The Mayflies of North America; if you have questions about the family classification see Higher classification.

ACANTHAMETROPODIDAE

  • Acanthametropus pecatonica (Burks, 1953) [USA:NE,SE]
    • Metreturus pecatonica Burks, 1953 (orig.)
  • Analetris eximia Edmunds, 1972 [CAN:NW;USA:NW]
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AMELETIDAE

  • Ameletus amador Mayo, 1939 [CAN:NW;USA:NW,SW]
  • Ameletus andersoni Zloty, 1996 [USA:NW]
  • Ameletus bellulus Zloty, 1996 [CAN:NW;USA:NW,SW]
  • Ameletus browni McDunnough, 1933 [CAN:NE;USA:NE]
  • Ameletus celer McDunnough, 1934 [CAN:NW;USA:NW,SW]
    • Ameletus alticolus McDunnough, 1934 (syn.)
    • Ameletus celeroides McDunnough, 1934 (syn.)
    • Ameletus tuberculatus McDunnough, 1939 (syn.)
  • Ameletus cooki McDunnough, 1929 [CAN:NW;USA:NW,SW]
  • Ameletus cryptostimulus Carle, 1978 [CAN:NE;USA:NE,SE]
  • Ameletus dissitus Eaton, 1885 [USA:NW]
  • Ameletus doddsianus Zloty, 1996 [USA:NW,SW]
    • Ameletus sp. A Allen & Chao, 1981 (syn.)
  • Ameletus edmundsi Zloty, 1996 [USA:NW,SW]
  • Ameletus exquisitus Eaton, 1885 [USA:NW]
  • Ameletus falsus McDunnough, 1938 [USA:NW,SW]
    • Ameletus sp. C Allen & Chao, 1981 (syn.)
  • Ameletus imbellis Day, 1952 [USA:NW,SW]
  • Ameletus inopinatus Eaton, 1887 [CAN:FN;USA:FN]
    • Ameletus alpinus Bengtsson, 1913 (syn.)
  • Ameletus janetae Kondratieff & Meyer, 2010 [USA:SE]
  • Ameletus lineatus Traver, 1932 [CAN:NE;USA:NE,SE]
  • Ameletus ludens Needham, 1905 [CAN:NE;USA:NE,SE]
  • Ameletus majusculus Zloty, 1996 [CAN:NW;USA:NW,SW]
  • Ameletus minimus Zloty & Harper, 1999 [USA:NW]
  • Ameletus oregonensis McDunnough, 1933 [CAN:NW;USA:NW]
  • Ameletus pritchardi Zloty, 1996 [CAN:NW;USA:NW]
  • Ameletus quadratus Zloty & Harper, 1999 [USA:NW]
  • Ameletus shepherdi Traver, 1934 [CAN:NW;USA:NW,SW]
    • Ameletus querulus McDunnough, 1938 (syn.)
  • Ameletus similior McDunnough, 1928 [CAN:NW;USA:NW,SW]
    • Ameletus monta Mayo, 1952 (syn.)
    • Ameletus montis Mayo, 1952 (syn.)
  • Ameletus sparsatus McDunnough, 1931 [CAN:FN,NW;USA:NW,SW]
    • Ameletus aequivocus McDunnough, 1934 (syn.)
  • Ameletus subnotatus Eaton, 1885 [CAN:NE,NW;USA:NW,SW]
  • Ameletus suffusus McDunnough, 1936 [CAN:NW;USA:NW,SW]
  • Ameletus tarteri Burrows, 1987 [USA:NE,SE]
  • Ameletus tertius McDunnough, 1938 [CAN:NE;USA:NE,SE]
  • Ameletus tolae Zloty, 1996 [USA:NW]
  • Ameletus validus McDunnough, 1923 [CAN:NW;USA:FN,NW,SW]
  • Ameletus vancouverensis McDunnough, 1933 [CAN:NW;USA:NW]
    • Ameletus facilis Day, 1952 (syn.)
  • Ameletus velox Dodds, 1923 [CAN:NW;USA:NW,SW]
    • Ameletus connectina McDunnough, 1939 (syn.)
    • Ameletus connectinus McDunnough, 1939 (syn.)
    • Ameletus connectus McDunnough, 1936 (syn.)
  • Ameletus vernalis McDunnough, 1924 [CAN:NW;USA:NW,SW]
  • Ameletus walleyi Harper, 1970 [CAN:NE;USA:NE]
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AMETROPODIDAE

  • Ametropus ammophilus Allen & Edmunds, 1976 [CAN:NW;USA:NW]
  • Ametropus fragilis Albarda, 1878 [CAN:FN,NE,NW;USA:FN,NE,NW,SW]
    • Ametropus albrighti Traver, 1935 (syn.)
    • Ametropus eatoni Brodsky, 1930 (syn.)
    • Ametropus neavei McDunnough, 1928 (syn.)
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ARTHROPLEIDAE

  • Arthroplea bipunctata (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
    • Cinygma bipunctata McDunnough, 1924 (orig.)
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BAETIDAE

  • Acentrella alachua (Berner, 1940) [USA:SE]
    • Baetis alachua Berner, 1940 (orig.)
    • Plauditus alachua (Berner, 1940) (comb.)
    • Pseudocloeon alachua (Berner, 1940) (comb.)
  • Acentrella barbarae Jacobus & McCafferty, 2006 [USA:NE,SE]
  • Acentrella feropagus Alba-Tercedor & McCafferty, 2000 [CAN:FN,NE;USA:FN]
    • Acentrella lapponica Bengtsson, 1912 (id.)
    • Baetis lapponicus (Bengtsson, 1912) (id.)
  • Acentrella insignificans (McDunnough, 1926) [CAN:FN,NW;MEX:SW;USA:FN,NE,NW,SW]
    • Baetis insignificans McDunnough, 1926 (orig.)
  • Acentrella lapponica Bengtsson, 1912 [CAN:FN,NW;USA:FN]
    • Baetis lapponicus (Bengtsson, 1912) (comb.)
  • Acentrella nadineae McCafferty, Waltz & Webb, 2009 [USA:NE,SE]
  • Acentrella parvula (McDunnough, 1932) [CAN:NE,NW;USA:NE,NW,SE]
    • Baetis armillatus McCafferty & Waltz, 1990 (syn.)
    • Plauditus armillatus (McCafferty & Waltz, 1990) (syn.comb.)
    • Plauditus parvulus (McDunnough, 1932) (comb.)
    • Pseudocloeon parvulum McDunnough, 1932 (orig.)
  • Acentrella rallatoma Burian & Myers, 2011 [USA:NE]
  • Acentrella turbida (McDunnough, 1924) [CAN:NE,NW;MEX:SW;USA:FN,NE,NW,SE,SW]
    • Acentrella carolina (Banks, 1924) (syn.)
    • Cloeon carolina Banks, 1924 (syn.)
    • Pseudocloeon carolina (Banks, 1924) (syn.)
    • Pseudocloeon turbidum McDunnough, 1924 (orig.)
  • Acerpenna akataleptos (McDunnough, 1926) [CAN:NW]
    • Baetis akataleptos McDunnough, 1926 (orig.)
  • Acerpenna macdunnoughi (Ide, 1937) [CAN:NE;USA:NE,SE]
    • Baetis macdunnoughi Ide, 1937 (orig.)
  • Acerpenna pygmaea (Hagen, 1861) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
    • Acerpenna sp. 1 McCafferty & Davis, 1992 (syn.)
    • Acerpenna harti (McDunnough, 1924) (syn.)
    • Baetis harti McDunnough, 1924 (syn.)
    • Baetis pygmaeus (Hagen, 1861) (comb.)
    • Baetis spiethi Berner, 1940 (syn.)
    • Cloe pygmaea Hagen, 1861 (orig.)
  • Americabaetis intermedius (Lugo-Ortiz & McCafferty, 1994) [MEX:FS]
    • Acerpenna intermedia Lugo-Ortiz & McCafferty, 1994 (orig.)
  • Americabaetis lugoi Waltz & McCafferty, 1999 [MEX:FS]
  • Americabaetis pleturus (Lugo-Ortiz & McCafferty, 1994) [MEX:FS,SW;USA:SW]
    • Acerpenna pletura Lugo-Ortiz & McCafferty, 1994 (orig.)
  • Anafroptilum album (McDunnough, 1926) [CAN:NE,NW;USA:NE,NW,SE,SW]
    • Centroptilum album McDunnough, 1926 (orig.)
    • Centroptilum convexum Ide, 1930 (syn.)
    • Centroptilum walshi McDunnough, 1929 (syn.)
    • Procloeon album (McDunnough, 1926) (comb.)
    • Procloeon convexum (Ide, 1930) (syn.)
    • Procloeon walshi (McDunnough, 1929) (comb.)
    • Procloeon sp. 2 McCafferty & Davis 1992 (syn.)
  • Anafroptilum asperatum (Traver, 1935) [USA:NW,SW]
    • Centroptilum asperatum Traver, 1935 (orig.)
    • Centroptilum elsa Traver, 1935 (syn.)
    • Centroptilum oreophilum Edmunds, 1954 (syn.)
    • Procloeon asperatum (Traver, 1935) (comb.)
    • Procloeon elsa (Traver, 1935) (syn.)
    • Procloeon oreophilum (Edmunds, 1954) (syn.)
  • Anafroptilum bifurcatum (McDunnough, 1924) [CAN:NE,NW;USA:NE,NW,SE]
    • Centroptilum bifurcatum McDunnough, 1924 (orig.)
    • Centroptilum selanderorum Edmunds, 1954 (syn.)
  • Anafroptilum conturbatum (McDunnough, 1929) [CAN:NE,NW;USA:NE,NW,SW]
    • Centroptilum conturbatum (McDunnough, 1929) (orig.)
    • Procloeon conturbatum (McDunnough, 1929) (comb.)
  • Anafroptilum minor (McDunnough, 1926) [CAN:NE;USA:NE,SE]
    • Centroptilum minor (McDunnough, 1926) (comb.)
    • Cloeon minor McDunnough, 1926 (orig.)
    • Procloeon minor (McDunnough, 1926) (comb.)
  • Anafroptilum ozarkense (Wiersema & Burian, 2000) [USA:SE]
    • Centroptilum okarkensum Wiersema & Burian, 2000 (orig.)
  • Anafroptilum semirufum (McDunnough, 1926) [CAN:NE;USA:NE]
    • Centroptilum semirufum McDunnough, 1926 (orig.)
  • Anafroptilum victoriae (McDunnough, 1938)( [CAN:NE, NW; USA:NE]
    • Centroptilum victoriae McDunnough, 1938 (orig.)
  • Apobaetis etowah (Traver, 1935) [CAN:NW;MEX:SW;USA:NE,NW,SE,SW]
    • Apobaetis indeprensus Day, 1955 (syn.)
    • Pseudocloeon etowah Traver, 1935 (orig.)
  • Apobaetis futilis (McDunnough, 1931) [CAN:NW;USA:SE,SW]
    • Baetis futile (McDunnough, 1931) (spell.)
    • Baetis futilis (McDunnough, 1931) (comb.)
    • Plauditus futilis (McDunnough, 1931) (comb.)
    • Pseudocloeon futile McDunnough, 1931 (orig.)
  • Apobaetis lakota McCafferty, 2000 [USA:NE]
  • Baetis adonis Traver, 1935 [MEX:SW;USA:NW,SW]
    • Baetis caelestis Allen & Murvosh, 1983 (syn.)
    • Baetis sp. A Morihara & McCafferty, 1979 (syn.)
  • Baetis alius Day, 1954 [USA:NW]
    • Baetis moqui Wiersema, Nelson & Kuehnl, 2005 (syn.)
  • Baetis bicaudatus Dodds, 1923 [CAN:FN,NW;USA:FN,NW,SW]
    • Baetis minimus Dodds, 1923 (syn.)
  • Baetis brunneicolor McDunnough, 1925 [CAN:NE,NW;USA:NE,NW,SE]
    • Baetis anachris Burks, 1953 (syn.)
    • Baetis hiemalis Leonard, 1950 (syn.)
    • Baetis phyllis Burks, 1953 (syn.)
  • Baetis bundyae Lehmkuhl, 1973 [CAN:FN,NE,NW;USA:FN,NE,NW]
    • Baetis bundyi Lehmkuhl, 1973 (spell.)
    • Baetis macani bundyae Lehmkuhl, 1973 (stat.)
  • Baetis diablus Day, 1954 [USA:NW]
  • Baetis flavistriga McDunnough, 1921 [CAN:FN,NE,NW;MEX:FS,SW;USA:FN,NE,NW,SE,SW]
    • Baetis caurinus Edmunds & Allen, 1957 (syn.)
    • Baetis levitans McDunnough, 1925 (syn.)
    • Baetis nanus McDunnough, 1923 (syn.)
    • Baetis ochris Burks, 1953 (syn.)
    • Baetis sinuosus Navas, 1924 (syn.)
  • Baetis foemina McDunnough, 1936 [CAN:FN,NE;USA:FN]
  • Baetis hudsonicus Ide, 1937 [CAN:FN,NE,NW]
  • Baetis intercalaris McDunnough, 1921 [CAN:NE,NW;USA:NE,NW,SE,SW]
    • Baetis lasallei Banks, 1924 (syn.)
  • Baetis magnus McCafferty & Waltz, 1986 [MEX:FS,SW;USA:NW,SW]
    • Baetis libos Allen & Murvosh, 1987 (syn.)
    • Baetis sp. B Morihara & McCafferty, 1979 (syn.)
  • Baetis notos Allen & Murvosh, 1987 [MEX:FS;USA:NW,SE,SW]
    • Baetis sp. C Morihara & McCafferty, 1979 (syn.)
  • Baetis palisadi Mayo, 1952 [USA:NW,SW]
  • Baetis persecutor McDunnough, 1939 [CAN:NW]
    • Baetis persecuta McDunnough, 1939 (spell.)
    • Baetis persecutus McDunnough, 1939 (spell.)
  • Baetis phoebus McDunnough, 1923 [CAN:NE;USA:NE,SE]
    • Baetis cingulatus McDunnough, 1925 (syn.)
    • Baetis pallidula McDunnough, 1924 (syn.)
    • Baetis pallidulus McDunnough, 1924 (syn.)
    • Baetis quebecensis Hubbard, 1974 (syn.)
  • Baetis piscatoris Traver, 1935 [USA:NW,SW]
  • Baetis pluto McDunnough, 1925 [CAN:NE;USA:NE,SE]
  • Baetis posticatus (Say, 1823) (dub.) [USA:NE]
    • Cloe posticata (Say, 1823) (comb.)
    • Cloeon posticata Say, 1823 (orig.)
  • Baetis rusticans McDunnough, 1925 [CAN:NE;USA:NE]
  • Baetis tricaudatus Dodds, 1923 [CAN:FN,NE,NW;MEX:FS,SW;USA:FN,NE,NW,SE,SW]
    • Baetis incertans McDunnough, 1925 (syn.)
    • Baetis intermedius Dodds, 1923 (syn.)
    • Baetis jesmondensis McDunnough, 1938 (syn.)
    • Baetis moffati Dodds, 1923 (syn.spell.)
    • Baetis moffatti Dodds, 1923 (syn.)
    • Baetis sp. No. 1 Traver, 1932 (syn.)
    • Baetis parallelus Banks, 1924 (syn.)
    • Baetis vagans McDunnough, 1925 (syn.)
  • Baetis vernus Curtis, 1834 [GRE:FN]
    • Baetis finitimus Eaton, 1871 (syn.)
    • Baetis tenax Eaton, 1870 (syn.)
    • Cloe verna (Curtis, 1834) (comb.)
    • Ephemera dubia Stephens, 1836 (syn.)
    • Ephemera phaeops Stephens, 1836 (syn.)
    • Vernobaetis vernus (Curtis, 1834) (unavail. comb).
  • Baetodes adustus Cohen & Allen, 1972 [MEX:FS]
  • Baetodes alleni McCafferty & Provonsha, 1993 [USA:SW]
  • Baetodes arizonensis Koss, 1972 [USA:SW]
    • Baetodes sigillatus Allen & Chao, 1972 (syn.)
  • Baetodes bibranchius McCafferty & Provonsha, 1993 [MEX:FS,SW;USA:NW,SW]
  • Baetodes caritus Cohen & Allen, 1972 [MEX:SW,FS]
    • Baetodes veracrusensis Mayo, 1972 (syn.)
  • Baetodes deficiens Cohen & Allen, 1972 [MEX:FS,SW;USA:SW]
    • Baetodes bellus Mayo, 1972 (syn.)
  • Baetodes edmundsi Koss, 1972 [MEX:SW;USA:NW,SW]
  • Baetodes fortinensis Mayo, 1972 [MEX:FS]
  • Baetodes fuscipes Cohen & Allen, 1972 [MEX:FS,SW]
    • Baetodes furvus Mayo, 1973 (syn.)
  • Baetodes inermis Cohen & Allen, 1972 [MEX:FS,SW;USA:SW]
  • Baetodes longus Mayo, 1973 [MEX:SW]
  • Baetodes obesus Mayo, 1972 [MEX:FS]
  • Baetodes pallidus Cohen & Allen, 1972 [MEX:FS]
  • Baetodes pictus Cohen & Allen, 1972 [MEX:FS,SW]
  • Baetodes tritus Cohen & Allen, 1972 [MEX:FS,SW]
  • Baetodes velmae Cohen & Allen, 1978 [MEX:SW]
  • Baetopus trishae Waltz, 2002 [USA:SE]
  • Barbaetis benfieldi Kennedy, 1985 [USA:SE]
  • Callibaetis californicus Banks, 1900 [MEX:FS,SW;USA:NW,SW]
  • Callibaetis distinctus Lugo-Ortiz & McCafferty, 1996 [MEX:SW]
  • Callibaetis ferrugineus ferrugineus (Walsh, 1862) [CAN:NE;USA:NE,SE]
    • Baetis ferrugineus (Walsh, 1862) (comb.)
    • Callibaetis ferrugineus (Walsh, 1862) (comb.)
    • Cloe ferruginea Walsh, 1862 (orig.)
  • Callibaetis ferrugineus hageni Eaton, 1885 [CAN:FN,NW;USA:FN,NW,SW]
    • Baetis tessellata Hagen, 1861 (hom.: B. tessellata Walker, 1853)
    • Callibaetis americanus Banks, 1900 (syn.)
    • Callibaetis carolus Traver, 1935 (syn.)
    • Callibaetis coloradensis Banks, 1900 (syn.)
    • Callibaetis evergreenensis Thew, 1959 (syn.)
    • Callibaetis fusca Dodds, 1923 (syn., spell.)
    • Callibaetis fuscus Dodds, 1923 (syn.)
    • Callibaetis hageni Eaton, 1885 (orig.)
    • Callibaetis hebes Upholt, 1936 (syn.)
    • Callibaetis nigritus Banks, 1918 (syn.)
    • Callibaetis tessellatus (Hagen, 1861) (hom.comb.)
  • Callibaetis floridanus Banks, 1900 [MEX:FS,SW;USA:NE,SE,SW]
    • Callibaetis completa Banks, 1930 (syn.)
  • Callibaetis fluctuans (Walsh, 1862) [CAN:NE;USA:FN,NE,NW,SE,SW]
    • Baetis fluctuans (Walsh, 1862) (comb.)
    • Callibaetis traverae Upholt, 1937 (syn.)
    • Cloe fluctuans Walsh, 1862 (orig.)
  • Callibaetis montanus Eaton, 1885 [MEX:FS,SW;USA:SW]
    • Callibaetis montanus montanus Eaton, 1885 (stat.)
  • Callibaetis pallidus Banks, 1900 [CAN:NE,NW;USA:NE,NW,SW]
    • Callibaetis semicostatus Banks, 1914 (syn.)
  • Callibaetis pictus (Eaton, 1871) [MEX:FS,SW;USA:NE,NW,SW]
    • Baetis pictus Eaton, 1871 (orig.)
    • Callibaetis centralis Peters, 1959 (syn.)
    • Callibaetis doddsi Traver, 1935 (syn.)
    • Callibaetis pacificus Seemann, 1927 (syn.)
    • Callibaetis signatus Banks, 1918 (syn.)
    • Callibaetis vitrea Dodds, 1923 (syn.)
  • Callibaetis pretiosus Banks, 1914 [CAN:NE;USA:NE,SE]
  • Callibaetis punctilusus McCafferty & Provonsha, 1993 [MEX:FS,SW;USA:SW]
    • Callibaetis montanus punctilusus McCafferty & Provonsha, 1993 (orig.)
  • Callibaetis skokianus Needham, 1903 [CAN:NE,NW;USA:NE]
    • Callibaetis brevicostatus Daggy, 1945 (syn.)
  • Callibaetis undatus (Pictet, 1843) (dub.) [MEX:FS]
    • Cloe undata Pictet, 1843 (orig.)
    • Cloeon undata (Pictet, 1843) (comb.)
  • Camelobaetidius arriaga (Traver & Edmunds, 1968) [MEX:FS]
    • Dactylobaetis arriaga Traver & Edmunds, 1968 (orig.)
    • Dactylobaetis chiapas Traver & Edmunds, 1968 (syn.)
    • Dactylobaetis jenseni Traver & Edmunds, 1968 (syn.)
    • Camelobaetidius chiapas (Traver & Edmunds, 1968) (syn.)
    • Camelobaetidius jenseni (Traver & Edmunds, 1968) (syn.)
  • Camelobaetidius kickapoo McCafferty, 2000 [MEX:FS,SW;USA:NW,SW]
    • Camelobaetidius sp. 1 McCafferty & Davis, 1992 (orig.)
  • Camelobaetidius maidu Jacobus & McCafferty, 2005 [MEX:FS,SW;USA:NW,SW]
  • Camelobaetidius mexicanus (Traver & Edmunds, 1968) [MEX:FS,SW;USA:NW,SW]
    • Dactylobaetis mexicanus Traver & Edmunds, 1968 (orig.)
  • Camelobaetidius musseri (Traver & Edmunds, 1968) [MEX:FS,SW;USA:SE,SW]
    • Camelobaetidius salinus (Allen & Chao, 1978) (syn.)
    • Camelobaetidius sinaloa (Allen & Murvosh, 1987) (syn.)
    • Dactylobaetis musseri Traver & Edmunds, 1968 (orig.)
    • Dactylobaetis salinus Allen & Chao, 1978 (syn.)
    • Dactylobaetis sinaloa Allen & Murvosh, 1987 (syn.)
  • Camelobaetidius shepardi Randolph & McCafferty, 2001 [MEX:FS]
  • Camelobaetidius variabilis Wiersema, 1998 [MEX:SW;USA:SW]
  • Camelobaetidius waltzi McCafferty, 1994 [USA:NE,SW]
  • Camelobaetidius warreni (Traver & Edmunds, 1968) [CAN:NW;MEX:FS,SW;USA:NE,NW,SW]
    • Camelobaetidius cepheus (Traver & Edmunds, 1968) (syn.)
    • Camelobaetidius navis (Allen & Chao, 1978) (syn.)
    • Camelobaetidius similis Lugo-Ortiz & McCafferty, 1995 (syn.)
    • Camelobaetidius trivialis (Allen & Chao, 1978) (syn.)
    • Camelobaetidius zenobia (Traver & Edmunds, 1968) (syn.)
    • Dactylobaetis cepheus Traver & Edmunds, 1968 (syn.)
    • Dactylobaetis navis Allen & Chao, 1978 (syn.)
    • Dactylobaetis trivialis Allen & Chao, 1978 (syn.)
    • Dactylobaetis warreni Traver & Edmunds, 1968 (orig.)
    • Dactylobaetis zenobia Traver & Edmunds, 1968 (syn.)
  • Cloeodes excogitatus Waltz & McCafferty, 1987 [MEX:FS,SW;USA:NW,SW]
  • Cloeodes macrolamellus Waltz & McCafferty, 1987 [MEX:SW;USA:SW]
  • Cloeodes peninsulus Waltz & McCafferty, 1987 [MEX:SW;USA:SW]
  • Cloeodes waltzi Wiersema & Baumgardner, 2000 [MEX:SW]
  • Cloeon dipterum (Linnaeus, 1761) [CAN:NE,NW;USA:FN,NE,SE]
    • Chloeon dipterum (Linnaeus, 1761) (comb.)
    • Cloe diptera (Linnaeus, 1761) (comb.)
    • Cloeon cognatum Stephens, 1835 (syn.)
    • Cloeon inscriptum Bengtsson, 1940 (syn.)
    • Cloeon pallida Leach, 1815 (syn.)
    • Cloeopsis diptera (Linnaeus, 1761) (comb.)
    • Ephemera diptera Linnaeus, 1761 (orig.)
  • Diphetor hageni (Eaton, 1885) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW]
    • Baetis devinctus Traver, 1935 (syn.)
    • Baetis hageni Eaton, 1885 (renam.)
    • Baetis herodes Burks, 1953 (syn.)
    • Baetis parvus Dodds, 1923 (syn.)
    • Baetis unicolor (Hagen, 1861) (hom.comb.)
    • Cloe unicolor Hagen, 1861 (hom.: C. unicolor Curtis, 1834)
    • Diphetor devinctus (Traver, 1935) (syn.)
  • Fallceon eatoni (Kimmins, 1934) [MEX:SW;USA:SW]
    • Baetis eatoni Kimmins, 1934 (orig.)
  • Fallceon fortipalpus Lugo-Ortiz & McCafferty, 1994 [MEX:SW]
  • Fallceon quilleri (Dodds, 1923) [CAN:NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW]
    • Baetis buenoi Allen, 1985 (syn.)
    • Baetis byblis Allen & Murvosh, 1983 (syn.)
    • Baetis cleptis Burks, 1953 (syn.)
    • Baetis endymion Traver, 1935 (syn.)
    • Baetis erebus Traver, 1935 (syn.)
    • Baetis leechi Day, 1954 (syn.)
    • Baetis quilleri Dodds, 1923 (orig.)
    • Fallceon buenoi (Allen, 1985) (syn.)
    • Fallceon byblis (Allen & Murvosh, 1983) (syn.)
  • Fallceon sageae McCafferty, 2008 [MEX:FS]
  • Fallceon sonora (Allen & Murvosh, 1987) [MEX:SW;USA:NW,SW]
    • Baetis sonora Allen & Murvosh, 1987 (orig.)
  • Fallceon thermophilos (McDunnough, 1926) [USA:NW]
    • Acerpenna sulfurosa (Day, 1954) (syn.)
    • Acerpenna sulfurosus (Day, 1954) (syn. spell)
    • Acerpenna thermophilos (McDunnough, 1926) (comb.)
    • Baetis sulfurosus Day, 1954 (syn.)
    • Baetis thermophilos McDunnough, 1926 (orig.)
    • Fallceon sulfurosus (Day, 1954) (syn.)
  • Heterocloeon amplum (Traver, 1932) [MEX:SW;USA:NE,SE,SW]
    • Acentrella ampla Traver, 1932 (orig.)
    • Baetis amplus (Traver, 1932) (comb.)
  • Heterocloeon berneri (Muller-Liebenau, 1974) [USA:SE]
    • Rheobaetis berneri Muller-Liebenau, 1974 (orig.)
  • Heterocloeon curiosum (McDunnough, 1923) [CAN:NE;USA:NE,SE]
    • Baetis curiosus (McDunnough, 1923) (comb.)
    • Centroptilum curiosum McDunnough, 1923 (orig.)
    • Rheobaetis traverae Muller-Liebenau, 1974 (syn.)
  • Heterocloeon frivolum (McDunnough, 1925) [CAN:NE;USA:NE,NW,SE]
    • Baetis frivolus McDunnough, 1925 (orig.)
    • Heterocloeon frivolus (McDunnough, 1925) (spell.)
  • Heterocloeon grande (Wiersema & Long, 2000) [USA:SE]
    • Plauditus grandis Wiersema & Long, 2000 (orig.)
  • Heterocloeon petersi (Muller-Liebenau, 1974) [USA:SE]
    • Rheobaetis petersi Muller-Liebenau, 1974 (orig.)
  • Iswaeon anoka (Daggy, 1945) [CAN:NE,NW;USA:NE,NW,SE]
    • Heterocloeon anoka (Daggy, 1945) (comb.)
    • Pseudocloeon anoka Daggy, 1945 (orig.)
    • Pseudocloeon edmundsi Jensen, 1969 (syn.)
  • Iswaeon davidi (Waltz & McCafferty, 2005) [USA:SE]
    • Heterocloeon davidi Waltz & McCafferty, 2005 (orig.)
  • Iswaeon rubrolaterale (McDunnough, 1931) [CAN:NW;USA:NW,SE]
    • Baetis rubrolaterale (McDunnough, 1931) (spell.)
    • Baetis rubrolateralis (McDunnough, 1931) (comb.)
    • Heterocloeon rubrolaterale (McDunnough, 1931) (comb.)
    • Plauditus rubrolateralis (McDunnough, 1931) (comb.)
    • Pseudocloeon rubrolaterale McDunnough, 1931 (orig.)
  • Kirmaushenkreena zarankoae McCafferty, 2011 [CAN:FN]
  • Labiobaetis apache McCafferty & Waltz, 1995 [USA:NW,SW]
    • Pseudocloeon apache (McCafferty & Waltz, 1995) (comb.)
  • Labiobaetis dardanus (McDunnough, 1923) [CAN:NE,NW;USA:FN,NE,NW,SE,SW]
    • Baetis dardanus McDunnough, 1923 (orig.)
    • Baetis elachistus Burks, 1953 (syn.)
    • Pseudocloeon dardanum (McDunnough, 1923) (comb.)
  • Labiobaetis ephippiatus (Traver, 1935) [CAN:NE;MEX:SW;USA:NE,SE,SW]
    • Acentrella ephippiatus (Traver, 1935) (comb., spell.)
    • Baetis ephippiatus Traver, 1935 (orig.)
    • Pseudocloeon ephippiatum (Traver, 1935) (comb.)
  • Labiobaetis frondalis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Baetis australis Traver, 1932 (syn.)
    • Baetis baeticatus Burks, 1953 (syn.)
    • Baetis frondalis McDunnough, 1925 (orig.)
    • Pseudocloeon frondale (McDunnough, 1925) (comb.)
  • Labiobaetis longipalpus (Morihara & McCafferty, 1979) [CAN:NE;USA:NE,SE]
    • Baetis longipalpus Morihara & McCafferty, 1979 (orig.)
    • Pseudocloeon longipalpus (Morihara & McCafferty, 1979) (comb.)
  • Labiobaetis propinquus (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
    • Acentrella propinquus (Walsh, 1863) (comb.,spell.)
    • Baetis propinquus (Walsh, 1863) (comb.)
    • Baetis spinosus McDunnough, 1925 (syn.)
    • Cloe propinqua Walsh, 1863 (renam.)
    • Cloe vicina Walsh, 1862 (hom. C. vicina Hagen, 1861)
    • Pseudocloeon propinquum (Walsh, 1863) (comb.)
  • Labiobaetis sonajuventus Webb, 2013 [USA:NW]
  • Moribaetis macaferti Waltz, 1985 [MEX:FS]
  • Moribaetis mimbresaurus McCafferty, 2007 [USA:SW]
  • Moribaetis salvini (Eaton, 1885) [MEX:FS]
    • Baetis salvini Eaton, 1885 (orig.)
  • Neocloeon alamance Traver, 1932 [USA:NE,SE]
    • Centroptilum alamance (Traver, 1932) (comb.)
    • Cloeon alamance (Traver, 1932) (comb.)
  • Neocloeon triangulifer (McDunnough, 1931) [CAN:NE;USA:NE,SE,SW]
    • Centroptilum triangulifer (McDunnough, 1931) (comb.)
    • Centroptilum sp. 1 McCafferty & Davis, 192 (syn.)
    • Cloeon triangulifer McDunnough, 1931 (orig.)
  • Paracloeodes fleeki McCafferty & Lenat, 2004 [USA:SE]
  • Paracloeodes lugoi Randolph & McCafferty, 2000 [MEX:FS]
  • Paracloeodes minutus (Daggy, 1945) [CAN:NE;MEX:SW;USA:NE,NW,SE,SW]
    • Paracloeodes abditus Day, 1955 (syn.)
    • Pseudocloeon minutum Daggy, 1945 (orig.)
  • Plauditus bimaculatus (Berner, 1946) [USA:SE]
    • Baetis bimaculatus (Berner, 1946) (comb.)
    • Pseudocloeon bimaculatum Berner, 1946 (orig.)
    • Pseudocloeon bimaculatus Berner, 1946 (spell.)
  • Plauditus cestus (Provonsha & McCafferty, 1982) [CAN:NE,NW;USA:NE,NW,SE]
    • Barbaetis cestus (Provonsha & McCafferty, 1982)(comb.)
    • Pseudocloeon cestum Provonsha & McCafferty, 1982 (orig.)
  • Plauditus cingulatus (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Baetis cinctutus McCafferty & Waltz, 1990 (syn.)
    • Plauditus cinctutus (McCafferty & Waltz, 1990) (syn.comb.)
    • Pseudocloeon cingulatum McDunnough, 1931 (orig.)
  • Plauditus dubius (Walsh, 1862) [CAN:NE,NW;USA:FN,NE,NW,SE]
    • Baetis dubius (Walsh, 1862) (comb.)
    • Cloe dubia Walsh, 1862 (orig.)
    • Cloeon chlorops McDunnough, 1923 (syn.)
    • Cloeon dubium (Walsh, 1862) (comb.)
    • Pseudocloeon chlorops (McDunnough, 1923) (syn.)
    • Pseudocloeon dubium (Walsh, 1862) (comb.)
  • Plauditus elliotti (Daggy, 1945) [CAN:NE;USA:NE]
    • Baetis elliotti (Daggy, 1945) (comb.)
    • Pseudocloeon elliotti Daggy, 1945 (orig.)
    • Pseudocloeon ida Daggy, 1945 (syn.)
  • Plauditus gloveri McCafferty & Waltz, 1998 [CAN:NE,NW;USA:NE,NW,SE]
  • Plauditus punctiventris (McDunnough, 1923) [CAN:NE,NW;USA:NE,SE,SW]
    • Baetis punctiventris (McDunnough, 1923) (comb.)
    • Baetis sp. 1 McCafferty & Davis, 1992 (syn.)
    • Cloeon punctiventris McDunnough, 1923 (orig.)
    • Pseudocloeon myrsum Burks, 1953 (syn.)
    • Pseudocloeon punctiventris (McDunnough, 1923) (comb.)
  • Plauditus texanus Wiersema, 1999 [USA:SW]
  • Plauditus veteris (McDunnough, 1924) [USA:NE,SE]
    • Baetis veteris (McDunnough, 1924) (comb.)
    • Pseudocloeon veteris McDunnough, 1924 (orig.)
  • Plauditus virilis (McDunnough, 1923) [CAN:NE,NW;MEX:SW;USA:NE,NW,SE,SW]
    • Acentrella sp. 1 Lugo-Ortiz & McCafferty, 1995 (syn.)
    • Acentrella sp. 2 Lugo-Ortiz & McCafferty, 1995 (syn.)
    • Baetis virile (McDunnough, 1923) (comb.spell.)
    • Baetis virilis (McDunnough, 1923) (comb.)
    • Cloeon virilis McDunnough, 1923 (orig.)
    • Pseudocloeon virile (McDunnough, 1923) (comb.)
    • Pseudocloeon virilis (McDunnough, 1923) (comb.spell.)
  • Procloeon bellum (McDunnough, 1924) [CAN:NE,NW;USA:NE]
    • Centroptilum bellum McDunnough, 1924 (orig.)
  • Procloeon caliginosum (McDunnough, 1925) [CAN:NE]
    • Centroptilum caliginosum McDunnough, 1925 (orig.)
  • Procloeon fragile (McDunnough, 1923) [CAN:NE;USA:NE,SE]
    • Centroptilum fragile McDunnough, 1923 (orig.)
  • Procloeon inanum (McDunnough, 1924) [CAN:NE,NW]
    • Cloeon inanum McDunnough, 1924 (orig.)
  • Procloeon ingens (McDunnough, 1923) [CAN:FN,NE,NW;USA:NE,NW]
    • Cloeon implicatum McDunnough, 1924 (syn.)
    • Cloeon ingens McDunnough, 1923 (orig.)
    • Procloeon implicatum (McDunnough, 1924) (syn.)
  • Procloeon insignificans (McDunnough, 1925) [CAN:NE]
    • Cloeon insignificans McDunnough, 1925 (orig.)
  • Procloeon intermediale (McDunnough), 1931 [CAN:NE;USA:NE,SE]
    • Centroptilum intermediale McDunnough, 1931 (orig.)
  • Procloeon mendax (Walsh), 1862 [CAN:NE,NW;USA:NE]
    • Cloe mendax Walsh, 1862 (orig.)
    • Cloeon mendax (Walsh, 1862) (comb.)
  • Procloeon nelsoni Wiersema, 1999 [USA:SE,SW]
  • Procloeon ozburni (McDunnough, 1924) [CAN:NE;USA:NE]
    • Centroptilum ozburni McDunnough, 1924 (orig.)
  • Procloeon pennulatum (Eaton, 1870) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW]
    • Centroptilum infrequens McDunnough, 1924 (syn.)
    • Centroptilum pennulatum Eaton, 1870 (orig.)
    • Pseudocentroptilum pennulatum (Eaton, 1870) (comb.)
  • Procloeon quaesitum (McDunnough, 1931) [CAN:NE,NW;USA:NE,SE]
    • Centroptilum quaesitum McDunnough, 1931 (orig.)
  • Procloeon rivulare (Traver, 1935) [CAN:NE;USA:NE,NW,SE,SW]
    • Centroptilum rivulare Traver, 1935 (orig.)
  • Procloeon rubropictum (McDunnough, 1923) [CAN:NE,NW;USA:NE,SE]
    • Cloeon rubropictum McDunnough, 1923 (orig.)
  • Procloeon rufostrigatum (McDunnough, 1924) [CAN:NE,NW;USA:NE,SE]
    • Centroptilum bistrigatum Daggy, 1945 (syn.)
    • Centroptilum hobbsi Berner, 1941 (syn.)
    • Centroptilum rufostrigatum McDunnough, 1924 (orig.)
    • Procloeon hobbsi (Berner, 1941) (syn.)
  • Procloeon simile (McDunnough, 1924) [CAN:NE;USA:NE,SE]
    • Centroptilum simile McDunnough, 1924 (orig.)
    • Centroptilum similie McDunnough, 1924 (spell.)
  • Procloeon simplex (McDunnough, 1925) [CAN:NE,NW;USA:NE,SE]
    • Cloeon simplex McDunnough, 1925 (orig.)
  • Procloeon texanum McCafferty & Provonsha, 1993 [USA:NE,SW]
    • Procloeon distinctum Wiersema, 1999 (syn.)
  • Procloeon venosum (Traver, 1935) [USA:NW,SW]
    • Centroptilum venosum Traver, 1935 (orig.)
  • Procloeon vicinum (Hagen, 1861) [CAN:NE;USA:SE]
    • Cloe vicina Hagen, 1861 (orig.)
    • Cloeon vicinum Hagen, 1861 (emend.)
  • Procloeon viridoculare (Berner, 1940) [CAN:NE,NW;USA:NE,NW,SE,SW]
    • Centroptilum viridocularis Berner, 1940 (orig.)
    • Procloeon irrubrum Lowen & Flannagan, 1992 (syn.)
    • Procloeon viridocularis (Berner, 1940) (comb., spell.)
  • Pseudocentroptiloides morihari Wiersema & McCafferty, 1998 [USA:SW]
    • Centroptilum sp. 2 McCafferty & Davis, 1992 (syn.)
  • Pseudocentroptiloides usa Waltz & McCafferty, 1989 [CAN:NE;USA:NE,SE]
  • Varipes lasiobrachius Lugo-Ortiz & McCafferty, 1998 [MEX:FS]
  • Waynokiops dentatogriphus Hill, Pfeiffer & Jacobus, 2010 [USA:NE,SE]
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BAETISCIDAE

  • Baetisca becki Schneider & Berner, 1963 [USA:SE]
  • Baetisca berneri Tarter & Kirchner, 1978 [USA:NE,SE]
  • Baetisca callosa Traver, 1931 (dub.) [CAN:NE;USA:SE]
  • Baetisca carolina Traver, 1931 [CAN:NE;USA:NE,SE]
    • Baetisca thomsenae Traver, 1937 (syn.)
  • Baetisca columbiana Edmunds, 1960 [CAN:NW;USA:NW]
  • Baetisca escambiensis Berner, 1955 [USA:SE]
  • Baetisca gibbera Berner, 1953 [USA:SE]
  • Baetisca lacustris McDunnough, 1932 [CAN:NE,NW;USA:NE,NW,SE]
    • Baetisca bajkovi Neave, 1934 (syn.)
  • Baetisca laurentina McDunnough, 1932 [CAN:FN,NE,NW;USA:NE,SE]
  • Baetisca obesa (Say), 1839 [CAN:FN,NE;USA:NE,SE]
    • Baetis obesa Say, 1839 (orig.)
  • Baetisca rogersi Berner, 1940 [USA:SE]
  • Baetisca rubescens (Provancher, 1878) [CAN:NE;USA:NE,SE]
    • Baetis rubescens (Provancher, 1878) (comb.)
    • Cloe rubescens Provancher, 1878 (orig.)
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BEHNINGIIDAE

  • Dolania americana Edmunds & Traver, 1959 [USA:NE,SE]
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CAENIDAE

  • Amercaenis cusabo Provonsha & McCafferty, 2006 [USA:SE]
  • Amercaenis ridens (McDunnough, 1931) [USA:NE,NW,SW]
    • Caenis ridens McDunnough, 1931 (orig.)
  • Brachycercus berneri Soldan, 1986 [USA:SE]
    • Brachycercus floridicola Soldan, 1986 (syn.)
    • Brachycercus sp. A Berner, 1950 (syn.)
  • Brachycercus harrisella Curtis, 1834 [CAN:NE,NW;USA:FN,NE,NW]
    • Brachycercus arcticus Soldan, 1986 (syn.)
    • Brachycercus edmundsi Soldan, 1986 (syn.)
    • Brachycercus magnus Tshernova, 1952 (syn.)
    • Brachycercus pallidus Tshernova, 1928 (syn.)
    • Brachycercus YUa Quan, Bae, Jung & Lee, 2002 (syn.)
    • Caenis harrisella (Curtis, 1834) (comb.)
    • Caenis pennata Stephens, 1835 (syn.)
    • Eurycaenis harrisella (Curtis, 1834) (comb.)
  • Brachycercus nitidus (Traver, 1932) [CAN:NE;USA:NE,SE]
    • Eurycaenis nitida Traver, 1932 (orig.)
  • Brachycercus ojibwe Sun & McCafferty, 2008 [CAN:NE;USA:NE]
  • Caenis amica Hagen, 1861 [CAN:NE,NW;MEX:SW;USA:FN,NE,NW,SE,SW]
    • Caenis simulans McDunnough, 1931 (syn.)
  • Caenis anceps Traver, 1935 [CAN:NE;MEX:FS;USA:NE,SE]
  • Caenis arwini McCafferty & Davis, 2001 [USA:SW]
  • Caenis bajaensis Allen & Murvosh, 1983 [MEX:FS,SW;USA:NW,SW]
  • Caenis candida Harper & Harper, 1981 [CAN:NE]
  • Caenis diminuta diminuta Walker, 1853 [CAN:NE;USA:NE,SE]
    • Caenis diminuta Walker, 1853 (orig.)
  • Caenis eglinensis Pescador & Richard, 2006 [USA:SE]
  • Caenis hilaris (Say, 1839) [CAN:NE,NW;USA:NE,SE,SW]
    • Ephemera hilaris Say, 1839 (orig.)
  • Caenis latipennis Banks, 1907 [CAN:NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW]
    • Caenis delicata Traver, 1935 (syn.)
    • Caenis forcipata McDunnough, 1931 (syn.)
    • Caenis gigas Burks, 1953 (syn.)
    • Caenis jocosa McDunnough, 1931 (syn.)
  • Caenis macafferti Provonsha, 1990 [USA:NE,SE]
  • Caenis punctata McDunnough, 1931 [CAN:NE;MEX:SW;USA:NE,NW,SE,SW]
  • Caenis tardata McDunnough, 1931 [CAN:NE,NW;USA:NE,NW,SE]
  • Caenis youngi Roemhild, 1984 [CAN:FN,NE,NW;USA:FN,NE,NW,SW]
  • Cercobrachys cree Sun, Webb & McCafferty, 2002 [CAN:NW;USA:NE,NW]
  • Cercobrachys etowah Soldan, 1986 [USA:NE,SE]
  • Cercobrachys fox Sun & McCafferty, 2008 [USA:NE]
  • Cercobrachys lilliei Sun & McCafferty, 2008 [USA:NE]
  • Cercobrachys pomeiok Sun & McCafferty, 2008 [USA:SE]
  • Cercobrachys serpentis Soldan, 1986 [USA:NW]
  • Cercobrachys winnebago Sun & McCafferty, 2008 [USA:NE,SW]
  • Latineosus cibola Sun & McCafferty, 2008 [MEX:SW;USA:SW]
  • Sparbarus choctaw Sun & McCafferty, 2008 [USA:SE]
  • Sparbarus coushatta Sun & McCafferty, 2008 [USA:SE,SW]
  • Sparbarus flavus (Traver, 1935) (dub.) [USA:SE]
    • Brachycercus flavus Traver, 1935 (orig.)
  • Sparbarus lacustris (Needham, 1918) [CAN:NE;USA:NE,SE,SW]
    • Brachycercus idei (Lestage, 1931) (syn.)
    • Brachycercus lacustris (Needham, 1918) (comb.)
    • Brachycercus pallidus (Ide, 1930) (syn.)
    • Caenis lacustris Needham, 1918 (orig.)
    • Eurycaenis idei Lestage, 1931 (syn.)
    • Eurycaenis lacustris (Needham, 1918) (comb.)
    • Eurycaenis pallida Ide, 1930 (syn.)
  • Sparbarus maculatus (Berner, 1946) [CAN:NE;USA:NE,SE,SW]
    • Brachycercus maculatus Berner, 1946 (orig.)
    • Brachycercus pini Soldan, 1986 (syn.)
  • Sparbarus miccosukee Sun & McCafferty, 2008 [USA:SE]
  • Sparbarus nasutus (Soldan, 1986) [USA:NE,SE]
    • Brachycercus nasutus Soldan, 1986 (orig.)
  • Susperatus prudens (McDunnough, 1931) [CAN:NW;USA:NE,NW,SE]
    • Brachycercus prudens (McDunnough, 1931) (comb.)
    • Eurycaenis prudens McDunnough, 1931 (orig.)
  • Susperatus tonkawa Sun & McCafferty, 2008 [USA:NW,SW]
  • Susperatus tuberculatus (Soldan, 1986) [USA:NW]
    • Brachycercus tuberculatus Soldan, 1986 (orig.)
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EPHEMERELLIDAE

  • Attenella attenuata (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Ephemerella attenuata McDunnough, 1925 (orig.)
    • Ephemerella hirsuta Berner, 1946 (syn.)
  • Attenella delantala (Mayo, 1952) [USA:NW,SW]
    • Ephemerella delantala Mayo, 1952 (orig.)
  • Attenella margarita (Needham, 1927) [CAN:NE,NW;USA:NE,NW,SE,SW]
    • Ephemerella margarita Needham, 1927 (orig.)
  • Attenella soquele (Day, 1954) [USA:NW,SW]
    • Ephemerella soquele Day, 1954 (orig.)
  • Caudatella edmundsi (Allen, 1959) [USA:NW,SW]
    • Ephemerella edmundsi Allen, 1959 (orig.)
  • Caudatella columbiella (McDunnough, 1935) [CAN:NW;USA:NW,SW]
    • Caudatella heterocaudata californica (Allen & Edmunds, 1961) (syn.)
    • Ephemerella columbiella McDunnough, 1935 (orig.)
    • Ephemerella heterocaudata californica Allen & Edmunds, 1961 (syn.)
  • Caudatella heterocaudata (McDunnough, 1929) [USA:NW]
    • Caudatella heterocaudata circia (Allen & Edmunds, 1961) (syn.)
    • Caudatella heterocaudata heterocaudata (McDunnough, 1929) (stat.)
    • Ephemerella heterocaudata circia Allen & Edmunds, 1961 (syn.)
    • Ephemerella heterocaudata heterocaudata McDunnough, 1929 (stat.)
  • Caudatella hystrix (Traver, 1934) [CAN:NW;USA:NW,SW]
    • Caudatella cascadia (Allen & Edmunds, 1961) (syn.)
    • Ephemerella cascadia Allen & Edmunds, 1961 (syn.)
    • Ephemerella hystrix Traver, 1934 (orig.)
    • Ephemerella spinosa Mayo, 1951 (syn.)
  • Caudatella jacobi (McDunnough, 1939) [CAN:NW;USA:FN,NW]
    • Ephemerella jacobi McDunnough, 1939 (orig.)
    • Ephemerella orestes Allen & Edmunds, 1961 (syn.)
  • Caurinella idahoensis Allen, 1984 [USA:NW]
  • Dannella lita (Burks, 1949) [CAN:NE,NW;USA:NE,SE]
    • Ephemerella lita Burks, 1949 (orig.)
    • Timpanoga lita (Burks, 1949) (comb.)
  • Dannella provonshai (McCafferty, 1977) [USA:NE,SE]
    • Ephemerella provonshai McCafferty, 1977 (orig.)
    • Timpanoga provonshai (McCafferty, 1977) (comb.)
  • Dannella simplex (McDunnough, 1925) [CAN:FN,NE,NW;USA:NE,SE]
    • Ephemerella simplex McDunnough, 1925 (orig.)
    • Timpanoga simplex (McDunnough, 1925) (comb.)
  • Dentatella coxalis (McDunnough, 1926) [CAN:NE;USA:NE]
    • Dannella bartoni (Allen, 1977) (syn.)
    • Dentatella bartoni (Allen, 1977) (syn.)
    • Dentatella danutae McCafferty, 2000 (syn.)
    • Ephemerella bartoni Allen, 1977 (syn.)
    • Ephemerella coxalis McDunnough, 1926 (orig.)
    • Eurylophella bartoni (Allen, 1977) (syn.)
    • Eurylophella coxalis (McDunnough, 1926) (comb.)
  • Drunella allegheniensis (Traver, 1934) [USA:SE]
    • Ephemerella allegheniensis Traver, 1934 (orig.)
  • Drunella coloradensis (Dodds, 1923) [CAN:FN,NW;MEX:SW;USA:FN,NW,SW]
    • Ephemerella coloradensis Dodds, 1923 (orig.)
    • Ephemerella wilsoni Mayo, 1952 (syn.)
  • Drunella cornuta (Morgan, 1911) [CAN:NE;USA:NE,SE]
    • Ephemerella cornuta Morgan, 1911 (orig.)
    • Ephemerella depressa Ide, 1930 (syn.)
  • Drunella cornutella (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ephemerella cornutella McDunnough, 1931 (orig.)
  • Drunella doddsii (Needham, 1927) [CAN:FN,NW;USA:FN,NW,SW]
    • Drunella doddsi (Needham, 1927) (spell.)
    • Ephemerella doddsi Needham, 1927 (comb.,spell.)
    • Ephemerella doddsii Needham, 1927 (orig.)
  • Drunella flavilinea (McDunnough, 1926) [CAN:NW;MEX:SW;USA:NW,SW]
    • Ephemerella flavilinea McDunnough, 1926 (orig.)
    • Ephemerella lapidula McDunnough, 1935 (syn.)
  • Drunella grandis flavitincta (McDunnough, 1934) [USA:NW]
    • Ephemerella flavitincta McDunnough, 1934 (orig.)
    • Ephemerella grandis flavitincta McDunnough, 1934 (stat.)
  • Drunella grandis grandis (Eaton, 1884) [USA:FN,NW,SW]
    • Drunella grandis (Eaton, 1884) (comb.)
    • Ephemerella glacialis carsona Day, 1952 (syn.)
    • Ephemerella grandis Eaton, 1884 (orig.)
    • Ephemerella grandis grandis Eaton, 1884 (stat.)
    • Ephemerella sp. No. 1 Mayo, 1952 (syn.)
  • Drunella grandis ingens (McDunnough, 1934) [CAN:FN,NW;USA:NW,SW]
    • Ephemerella glacialis Traver, 1934 (syn.)
    • Ephemerella glacialis glacialis Traver, 1934 (syn.)
    • Ephemerella grandis ingens McDunnough, 1934 (stat.)
    • Ephemerella ingens McDunnough, 1934 (orig.)
    • Ephemerella proserpina Traver, 1934 (syn.)
    • Ephemerella yosemite Traver, 1934 (syn.)
  • Drunella lata (Morgan, 1911) [CAN:NE;USA:NE,SE]
    • Drunella longicornis (Traver, 1932) (syn.)
    • Ephemerella inflata McDunnough, 1926 (syn.)
    • Ephemerella lata Morgan, 1911 (orig.)
    • Ephemerella longicornis Traver, 1932 (syn.)
  • Drunella pelosa (Mayo, 1951) [CAN:NW;USA:NW,SW]
    • Ephemerella pelosa Mayo, 1951 (orig.)
  • Drunella spinifera (Needham, 1927) [CAN:FN,NW;USA:FN,NW,SW]
    • Ephemerella autumnalis McDunnough, 1934 (syn.)
    • Ephemerella sierra Mayo, 1952 (syn.)
    • Ephemerella spinifera Needham, 1927 (orig.)
  • Drunella tuberculata (Morgan, 1911) [CAN:NE;USA:NE,SE]
    • Drunella conestee (Traver, 1932) (syn.)
    • Ephemerella cherokee Traver, 1937 (syn.)
    • Ephemerella conestee Traver, 1932 (syn.)
    • Ephemerella tuberculata Morgan, 1911 (orig.)
  • Drunella walkeri (Eaton, 1884) [CAN:NE;USA:NE,SE]
    • Baetis fuscata Walker, 1853 (hom.: B. fuscata Stephens, 1835)
    • Drunella wayah (Traver, 1932) (syn.)
    • Ephemerella bispina Needham, 1905 (syn.)
    • Ephemerella fuscata (Walker, 1853) (hom.comb.)
    • Ephemerella walkeri Eaton, 1884 (renam.)
    • Ephemerella wayah Traver, 1932 (syn.)
  • Ephemerella alleni Jensen & Edmunds, 1966 [USA:NW]
  • Ephemerella apopsis McCafferty, 1992 [USA:NW]
  • Ephemerella aurivillii (Bengtsson, 1908) [CAN:FN,NE,NW;USA:FN,NE,NW,SW]
    • Chitonophora aurivillii Bengtsson, 1908 (orig.)
    • Cincticostella ezoensis (Gose, 1980) (syn.)
    • Ephemerella aurivilliusi (Bengtsson, 1908) (spell.)
    • Ephemerella aroni Eaton, 1908 (syn.)
    • Ephemerella aronii Eaton, 1908 (syn.)
    • Ephemerella concinnata Traver, 1934 (syn.)
    • Ephemerella ezoensis Gose, 1980 (syn.)
    • Ephemerella nN Imanishi, 1940 (syn.)
    • Ephemerella norda McDunnough, 1924 (syn.)
    • Ephemerella taeniata Tshernova, 1952 (syn.)
  • Ephemerella catawba Traver, 1932 [USA:NE,SE]
  • Ephemerella consimilis Walsh, 1862 (dub.) [USA:NE]
  • Ephemerella dorothea dorothea Needham, 1908 [CAN:NE;USA:NE,SE]
    • Ephemerella dorothea Needham, 1908 (orig.)
  • Ephemerella dorothea infrequens McDunnough, 1924 [CAN:NW;USA:FN,NW,SW]
    • Ephemerella infrequens McDunnough, 1924 (orig.)
    • Ephemerella mollitia Seemann, 1927 (syn.)
  • Ephemerella excrucians Walsh, 1862 [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
    • Ephemerella argo Burks, 1947 (syn.)
    • Ephemerella crenula Allen & Edmunds, 1965 (syn.)
    • Ephemerella excurcians Walsh, 1862 (spell.)
    • Ephemerella inermis Eaton, 1884 (syn.)
    • Ephemerella lacustris Allen & Edmunds, 1965 (syn.)
    • Ephemerella ora Burks, 1949 (syn.)
    • Ephemerella rama Allen, 1968 (syn.)
    • Ephemerella rossi Allen & Edmunds, 1965 (syn.)
    • Ephemerella semiflava McDunnough, 1926 (syn.)
  • Ephemerella floripara McCafferty, 1985 [USA:SE]
  • Ephemerella hispida Allen & Edmunds, 1965 [USA:SE]
  • Ephemerella invaria (Walker, 1853) [CAN:FN,NE;USA:NE,SE]
    • Baetis invaria Walker, 1853 (orig.)
    • Chitonophora vernalis (Banks, 1914) (syn.)
    • Ephemerella choctawhatchee Berner, 1946 (syn.)
    • Ephemerella femenina Needham, 1924 (syn.spell.)
    • Ephemerella feminina Needham, 1924 (syn.)
    • Ephemerella fratercula McDunnough, 1925 (syn.)
    • Ephemerella inconstans Traver, 1932 (syn.)
    • Ephemerella rotunda Morgan, 1911 (syn.)
    • Ephemerella simila Allen & Edmunds, 1965 (syn.)
    • Ephemerella vernalis Banks, 1914 (syn.)
  • Ephemerella maculata Traver, 1934 [CAN:FN;USA:NW,SW]
    • Ephemerella euterpe Traver, 1934 (syn.)
  • Ephemerella molita McDunnough, 1930 (dub.) [CAN:NE]
  • Ephemerella mucronata (Bengtsson, 1909) [CAN:FN,NW;USA:NW]
    • Chitonophora krieghoffi Ulmer, 1920 (syn.)
    • Chitonophora mucronata Bengtsson, 1909 (orig.)
    • Chitonophora mucronata unicolorata Ikonomov, 1961 (syn.)
    • Chitonophora sp. nympha unicolorata Ikonomov, 1961 (syn.)
    • Ephemerella krieghoffi (Ulmer, 1920) (syn.)
    • Ephemerella krieghoffi intermedia Keffermuller, 1979 (syn.)
    • Ephemerella moffatae Allen, 1977 (syn.)
    • Ephemerella mucronata unicolorata (Ikonomov, 1961) (syn.)
    • Ephemerella sp. nympha unicolorata (Ikonomov, 1961) (syn.)
    • Ephemerella unicolorata (Ikonomov, 1961) (syn.)
  • Ephemerella needhami McDunnough, 1925 [CAN:NE,NW;USA:NE,SE]
  • Ephemerella nuda Tshernova, 1949 [USA:FN]
    • Ephemerella thymali Tshernova, 1952 (syn.)
    • Ephemerella verrucosa Kluge, 1980 (syn.)
  • Ephemerella subvaria McDunnough, 1931 [CAN:NE;USA:NE,SE]
  • Ephemerella tibialis McDunnough, 1924 [CAN:FN,NW;USA:FN,NW,SW]
    • Ephemerella angusta Traver, 1934 (syn.)
    • Ephemerella angustata Traver, 1934 (spell. syn.)
    • Ephemerella sequoia Allen & Collins, 1968 (syn.)
    • Serratella sequoia (Allen & Collins, 1968) (syn.)
    • Serratella tibialis (McDunnough, 1924) (comb.)
  • Ephemerella unicornis Needham, 1905 (dub.) [USA:NE]
  • Ephemerella velmae Allen & Edmunds, 1963 [USA:NW,SW]
    • Serratella velmae (Allen & Edmunds, 1963) (comb.)
  • Ephemerella verruca Allen & Edmunds, 1965 [USA:NW]
  • Eurylophella aestiva (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ephemerella aestiva McDunnough, 1931 (orig.)
  • Eurylophella bicolor (Clemens, 1913) [CAN:FN,NE,NW;USA:NE,SE]
    • Ephemerella bicolor Clemens, 1913 (orig.)
  • Eurylophella bicoloroides (McDunnough, 1938) [CAN:NE;USA:NE]
    • Ephemerella bicoloroides McDunnough, 1938 (orig.)
  • Eurylophella doris (Traver, 1934) [USA:SE]
    • Ephemerella doris Traver, 1934 (orig.)
    • Ephemerella trilineata Berner, 1946 (syn.)
  • Eurylophella enoensis Funk, 1994 [CAN:NE;USA:NE,SE]
  • Eurylophella funeralis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Ephemerella funeralis McDunnough, 1925 (orig.)
  • Eurylophella lodi (Mayo, 1952) [CAN:NW;USA:NW]
    • Ephemerella lodi Mayo, 1952 (orig.)
  • Eurylophella lutulenta (Clemens, 1913) [CAN:NE;USA:NE,SE]
    • Ephemerella lineata Clemens, 1913 (syn.)
    • Ephemerella lutulenta Clemens, 1913 (orig.)
  • Eurylophella macdunnoughi Funk, 1994 [USA:NE,SE]
  • Eurylophella minimella (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ephemerella minimella McDunnough, 1931 (orig.)
  • Eurylophella oviruptis Funk, 2008 [USA:SE]
  • Eurylophella poconoensis Funk, 1994 [USA:NE]
  • Eurylophella prudentalis (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ephemerella prudentalis McDunnough, 1931 (orig.)
  • Eurylophella temporalis (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
    • Ephemerella temporalis McDunnough, 1924 (orig.)
  • Eurylophella verisimilis (McDunnough, 1930) [CAN:NE;USA:NE,SE]
    • Ephemerella verisimilis McDunnough, 1930 (orig.)
    • Eurylophella versimilis (McDunnough, 1930) (spell.comb.)
  • Matriella teresa (Traver, 1934) [CAN:NW;USA:NW,SW]
    • Ephemerella cognata Traver, 1934 (syn.)
    • Ephemerella teresa Traver, 1934 (orig.)
    • Serratella teresa (Traver, 1934) (comb.)
  • Penelomax septentrionalis (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Ephemerella septentrionalis McDunnough, 1925 (orig.)
  • Serratella frisoni (McDunnough, 1927) [USA:NE,SE]
    • Ephemerella frisoni McDunnough, 1927 (orig.)
  • Serratella levis (Day, 1954) [USA:NW,SW]
    • Ephemerella levis Day, 1954 (orig.)
    • Ephemerella sp. No. 2 Mayo, 1952 (syn.)
  • Serratella micheneri (Traver, 1934) [MEX:SW;USA:NW,SW]
    • Ephemerella altana Allen, 1968 (syn.)
    • Ephemerella micheneri Traver, 1934 (orig.)
  • Serratella serrata (Morgan, 1911) [CAN:NE,NW;USA:NE,SE]
    • Ephemerella carolina Berner & Allen, 1961 (syn.)
    • Ephemerella serrata Morgan, 1911 (orig.)
    • Ephemerella sordida McDunnough, 1925 (syn.)
    • Ephemerella spiculosa Berner & Allen, 1961 (syn.)
    • Serratella carolina (Berner & Allen, 1961) (syn.)
    • Serratella sordida (McDunnough, 1925) (syn.)
    • Serratella spiculosa (Berner & Allen, 1961) (syn.)
  • Serratella serratoides (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ephemerella serratoides McDunnough, 1931 (orig.)
  • Teloganopsis deficiens (Morgan, 1911) [CAN:NE;USA:NE,SE]
    • Ephemerella atrescens McDunnough, 1925 (syn.)
    • Ephemerella deficiens Morgan, 1911 (orig.)
    • Serratella deficiens (Morgan, 1911) (comb.)
  • Timpanoga hecuba hecuba (Eaton, 1884) [CAN:NW;USA:NW,SW]
    • Ephemerella hecuba Eaton, 1884 (orig.)
    • Ephemerella hecuba hecuba Eaton, 1884 (stat.)
  • Timpanoga hecuba pacifica (Allen & Edmunds, 1959) [USA:NW]
    • Ephemerella hecuba pacifica Allen & Edmunds, 1959 (orig.)
  • Tsalia berneri (Allen & Edmunds, 1958) [USA:SE]
    • Ephemerella berneri Allen & Edmunds, 1958 (orig.)
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EPHEMERIDAE

  • Ephemera blanda Traver, 1932 [CAN:NE;USA:SE]
    • Ephemera triplex Traver, 1935 (syn.)
  • Ephemera compar Hagen, 1875 [USA:NW] (recently extinct)
  • Ephemera guttulata Pictet, 1843 [CAN:NE;USA:NE,SE]
  • Ephemera simulans Walker, 1853 [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
    • Ephemera decora Walker, 1853 (syn.)
    • Ephemera natata (Walker, 1853) (syn.)
    • Palingenia natata Walker, 1853 (syn.)
  • Ephemera traverae Spieth, 1938 [USA:SE]
    • Ephemera traveri Spieth, 1938 (spell.)
  • Ephemera varia Eaton, 1883 [CAN:NE;USA:NE,SE]
  • Hexagenia albivitta (Walker, 1853) [MEX:FS]
    • Baetis albivitta Walker, 1853 (orig.)
    • Hexagenia albivittata (Walker, 1853) (spell.)
    • Hexagenia benedicta Navas, 1922 (syn.)
    • Hexagenia dominans Navas, 1936 (syn.)
    • Palingenia continua Eaton, 1860 (syn.)
    • Palingenia dorsigera Hagen, 1861 (syn.nud.)
  • Hexagenia atrocaudata McDunnough, 1924 [CAN:NE;USA:NE,SE]
  • Hexagenia bilineata (Say, 1824) [CAN:NE;MEX:FS,SW;USA:NE,SE,SW]
    • Baetis bilineata Say, 1824 (orig.)
    • Palingenia bilineata (Say, 1824) (comb.)
  • Hexagenia limbata (Serville, 1829) [CAN:FN,NE,NW;MEX:FS,SW;USA:NE,NW,SE,SW]
    • Ephemera limbata Serville, 1829 (orig.)
    • Hexagenia affiliata McDunnough, 1927 (syn.)
    • Hexagenia californica Upholt, 1937 (syn.)
    • Hexagenia carolina Traver, 1931 (syn.)
    • Hexagenia elegans Traver, 1931 (syn.)
    • Hexagenia kanuga Traver, 1937 (syn.)
    • Hexagenia marilandica Traver, 1931 (syn.)
    • Hexagenia mingo Traver, 1931 (syn.)
    • Hexagenia munda Eaton, 1883 (syn.)
    • Hexagenia occulta (Walker, 1853) (syn.)
    • Hexagenia pallens Traver, 1935 (syn.)
    • Hexagenia rosacea Traver, 1931 (syn.)
    • Hexagenia variabilis Eaton, 1883 (syn.)
    • Hexagenia venusta Eaton, 1883 (syn.)
    • Hexagenia viridescens (Walker, 1853) (syn.)
    • Hexagenia weewa Traver, 1931 (syn.)
    • Palingenia limbata (Serville, 1829) (comb.)
    • Palingenia occulta Walker, 1853 (syn.)
    • Palingenia viridescens Walker, 1853 (syn.)
  • Hexagenia mexicana Eaton, 1883 [MEX:FS]
  • Hexagenia orlando Traver, 1931 [USA:SE]
  • Hexagenia rigida McDunnough, 1924 [CAN:NE;USA:NE,SE]
    • Hexagenia form falcata Needham, 1920 (syn.nud.)
  • Litobrancha recurvata (Morgan, 1913) [CAN:NE;USA:NE,SE]
    • Hexagenia recurrata Morgan, 1913 (spell.)
    • Hexagenia recurvata Morgan, 1913 (orig.)
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EUTHYPLOCIIDAE

  • Euthyplocia hecuba (Hagen, 1861) [MEX:FS,SW]
    • Palingenia hecuba Hagen, 1861 (orig.)
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HEPTAGENIIDAE

  • Anepeorus rusticus McDunnough, 1925 [CAN:NW;USA:NW]
    • Acanthomola pubescens Whiting & Lehmkuhl, 1987 (syn.)
  • Cinygma dimicki McDunnough, 1934 [USA:NW]
  • Cinygma integrum Eaton, 1885 [CAN:NW;USA:NW,SW]
  • Cinygma lyriforme (McDunnough, 1924) [CAN:NW;USA:FN,NW,SW]
    • Cinygma lyriformis (McDunnough, 1924) (spell.)
    • Cinygma petersoni (Lestage, 1930) (syn.)
    • Ecdyonurus lyriformis McDunnough, 1924 (orig.)
    • Ecdyonurus peterseni Lestage, 1930 (syn.)
    • Ecdyonurus hyalinus Esben-Petersen, 1916 (hom.: E. hyalinus Ulmer, 1912)
    • Heptagenia abnorme Tshernova, 1949 (syn.)
    • Heptagenia abnormis Tshernova, 1949 (syn.)
  • Cinygmula gartrelli McDunnough, 1934 [CAN:NW;USA:NW]
    • Rhithrogena gartrelli (McDunnough, 1934) (comb.)
  • Cinygmula kootenai McDunnough, 1943 [CAN:NW;USA:NW]
    • Rhithrogena kootenai (McDunnough, 1943) (comb.)
  • Cinygmula mimus (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
    • Cinygma mimus Eaton, 1885 (orig.)
    • Rhithrogena mimus (Eaton, 1885) (comb.)
  • Cinygmula par (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
    • Cinygma confusa McDunnough, 1924 (syn.)
    • Cinygma par Eaton, 1885 (orig.)
    • Cinygma hyalina McDunnough, 1924 (syn.)
    • Cinygmula confusa (McDunnough, 1924) (syn.)
    • Cinygmula hyalina (McDunnough, 1924) (syn.)
    • Rhithrogena confusa (McDunnough, 1924) (syn.)
    • Rhithrogena par (Eaton, 1885) (comb.)
  • Cinygmula ramaleyi (Dodds, 1923) [CAN:FN,NW;USA:NW,SW]
    • Cinygma ramaleyi (Dodds, 1923) (comb.)
    • Ecdyonurus ramaleyi Dodds, 1923 (orig.)
    • Iron tollandi Dodds, 1923 (syn.)
    • Rhithrogena ramaleyi (Dodds, 1923) (comb.)
  • Cinygmula reticulata McDunnough, 1934 [CAN:NW;USA:NW,SW]
    • Rhithrogena reticulata (McDunnough, 1934) (comb.)
  • Cinygmula subaequalis (Banks, 1914) [CAN:NE;USA:FN,NE,SE]
    • Cinygma atlantica McDunnough, 1924 (syn.)
    • Cinygmula atlantica (McDunnough, 1924) (syn.)
    • Heptagenia subaequalis Banks, 1914 (orig.)
    • Rhithrogena subaequalis (Banks, 1914) (comb.)
    • Stenonema subaequalis (Banks, 1914) (comb.)
  • Cinygmula tarda (McDunnough, 1929) [CAN:FN,NW;USA:FN,NW]
    • Cinygma tarda McDunnough, 1929 (orig.)
    • Rhithrogena tarda (McDunnough, 1929) (comb.)
  • Cinygmula tioga Mayo, 1952 [USA:NW]
    • Rhithrogena tioga (Mayo, 1952) (comb.)
  • Cinygmula uniformis McDunnough, 1934 [CAN:FN,NW;USA:NW,SW]
    • Rhithrogena uniformis (McDunnough, 1934) (comb.)
  • Ecdyonurus bellus (Allen & Cohen, 1977) [MEX:FS]
    • Nixe bella (Allen & Cohen, 1977) (comb.)
    • Heptagenia bella Allen & Cohen, 1977 (orig.)
  • Ecdyonurus criddlei (McDunnough, 1927) [CAN:NW;MEX:SW;USA:NW,SW]
    • Ecdyonurus otiosus (McDunnough, 1935) (syn.)
    • Ecdyonurus rosea (Traver, 1935) (syn.)
    • Ecdyonurus salvini (Kimmins, 1934) (syn.)
    • Heptagenia criddlei McDunnough, 1927 (orig.)
    • Heptagenia otiosa McDunnough, 1935 (syn.)
    • Heptagenia rosea Traver, 1935 (syn.)
    • Heptagenia rubroventris Traver, 1935 (syn.)
    • Heptagenia salvini Kimmins, 1934 (syn.)
    • Nixe criddlei (McDunnough, 1927) (comb.)
    • Nixe otiosa (McDunnough, 1935) (syn.)
    • Nixe rosea (Traver, 1935) (syn.)
    • Nixe salvini (Kimmins, 1934) (syn.)
  • Ecdyonurus simplicioides (McDunnough, 1924) [CAN:NE,NW;USA:FN,NW,SW]
    • Ecdyonurus rodocki (Traver, 1935) (syn.)
    • Ecdyonurus werestschagini (Tshernova, 1952) (syn.)
    • Heptagenia rodocki Traver, 1935 (syn.)
    • Heptagenia simpliciodes McDunnough, 1924 (spell.)
    • Heptagenia simplicioides McDunnough, 1924 (orig.)
    • Heptagenia werestschagini Tshernova, 1952 (syn.)
    • Nixe rodocki (Traver, 1935) (syn.)
    • Nixe simpliciodes (McDunnough, 1935) (syn.)
    • Paracynigmula simpliciodides (McDunnough, 1924) (comb.)
    • Rhithrogena imanica Bajkova, 1972 (syn.)
  • Epeorus albertae (McDunnough, 1924) [CAN:NE,NW;USA:FN,NW,SW]
    • Iron albertae McDunnough, 1924 (orig.)
    • Iron youngi Traver, 1935 (syn.)
  • Epeorus deceptivus (McDunnough, 1924) [CAN:FN,NW;USA:FN,NW,SW]
    • Cinygma deceptiva McDunnough, 1924 (orig.)
    • Iron deceptivus (McDunnough, 1924) (comb.)
  • Epeorus dispar (Traver, 1933) [USA:SE]
    • Iron dispar Traver, 1933 (orig.)
  • Epeorus dulciana (McDunnough, 1935) [CAN:NW;USA:NW,SW]
    • Iron dulciana McDunnough, 1935 (orig.)
  • Epeorus fragilis (Morgan, 1911) [CAN:NE;USA:NE,SE]
    • Iron fragilis Morgan, 1911 (orig.)
    • Iron tenuis Traver, 1935 (syn.)
  • Epeorus frisoni (Burks, 1946) [USA:NE]
    • Iron frisoni Burks, 1946 (orig.)
  • Epeorus grandis (McDunnough, 1924) [CAN:FN,NW;USA:FN,NW,SW]
    • Ironopsis grandis (McDunnough, 1924) (comb.)
    • Iron grandis McDunnough, 1924 (orig.)
  • Epeorus hesperus (Banks, 1924) [USA:NW,SW]
    • Iron hesperus (Banks, 1924) (comb.)
    • Iron sancta-gabriel Traver, 1935 (syn.)
    • Rhithrogena hespera Banks, 1924 (orig.)
  • Epeorus lagunitas (Traver, 1935) [USA:NW]
    • Iron lagunitas Traver, 1935 (orig.)
  • Epeorus longimanus (Eaton, 1885) [CAN:FN,NW;USA:FN,NW,SW]
    • Iron longimanus Eaton, 1885 (orig.)
    • Iron proprius Traver, 1935 (syn.)
  • Epeorus margarita Edmunds & Allen, 1964 [MEX:SW;USA:NW,SW]
    • Iron margarita (Edmunds & 1964) (comb.)
  • Epeorus metlacensis Traver, 1964 [MEX:FS,SW]
    • Iron metlacensis (Traver, 1964) (comb.)
  • Epeorus namatus (Burks, 1946) [USA:NE,SE]
    • Iron namatus Burks, 1946 (orig.)
  • Epeorus permagnus (Traver, 1935) [CAN:NW;USA:NW]
    • Ironopsis permagnus Traver, 1935 (orig.)
  • Epeorus pleuralis (Banks, 1910) [CAN:NE;USA:NE,SE]
    • Heptagenia pleuralis Banks, 1910 (orig.)
    • Iron confusus Traver, 1935 (syn.)
    • Iron fraudator Traver, 1935 (syn.)
    • Iron pleuralis (Banks, 1910) (comb.)
  • Epeorus punctatus (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Iron punctatus McDunnough, 1925 (orig.)
  • Epeorus subpallidus (Traver, 1937) [USA:SE]
    • Iron subpallidus Traver, 1937 (orig.)
  • Epeorus suffusus (McDunnough, 1925) [CAN:NE;USA:NE]
    • Iron suffusus McDunnough, 1925 (orig.)
  • Epeorus vitreus (Walker, 1853) [CAN:NE;USA:NE,SE]
    • Epeorus humeralis Morgan, 1911 (syn.)
    • Epeorus rubidus (Traver, 1933) (syn.)
    • Heptagenia vitrea (Walker, 1853) (comb.)
    • Iron humeralis (Morgan, 1911) (syn.)
    • Iron vitreus (Walker, 1853) (comb.)
    • Iron rubidus Traver, 1933 (syn.)
    • Palingenia vitrea Walker, 1853 (orig.)
    • Rhithrogena vitrea (Walker, 1853) (comb.)
  • Heptagenia adaequata McDunnough, 1924 [CAN:NW;USA:NW,SW]
    • Heptagenia adequata McDunnough, 1924 (spell.)
  • Heptagenia culacantha Evans, Botts & Flowers, 1985 [USA:NE]
  • Heptagenia dalecarlica Bengtsson, 1912 [CAN:NE]
    • Heptagenia soldatovi Teshernova, 1952 (syn.)
  • Heptagenia dolosa Traver, 1935 [USA:SE]
  • Heptagenia elegantula (Eaton, 1885) [CAN:NE,NW;MEX:SW;USA:NE,NW,SE,SW]
    • Heptagenia coxalis Banks, 1914 (syn.)
    • Heptagenia diabasia Burks, 1946 (syn.)
    • Heptagenia querula McDunnough, 1924 (syn.)
    • Rhithrogena elegantula Eaton, 1885 (orig.)
  • Heptagenia flavescens (Walsh, 1862) [CAN:FN,NE,NW;MEX:SW;USA:NE,NW,SE,SW]
    • Palingenia flavescens Walsh, 1862 (orig.)
  • Heptagenia julia Traver, 1933 [USA:NE,SE]
  • Heptagenia marginalis Banks, 1910 [CAN:NE;USA:NE,SE]
  • Heptagenia pulla (Clemens, 1913) [CAN:FN,NE,NW;USA:FN,NE,SE]
    • Ecdyonurus pullus (Clemens, 1913) (comb.)
    • Ecdyurus grandis Clemens, 1913 (nomen. nud.)
    • Ecdyurus pullus Clemens, 1913 (orig.)
    • Heptagenia pullus Clemens, 1913 (spell.)
  • Heptagenia solitaria McDunnough, 1924 [CAN:FN,NW;USA:NW,SW]
  • Heptagenia townesi Traver, 1935 [USA:SE]
  • Heptagenia whitingi Webb & McCafferty, 2007 [CAN:NW;USA:NE,NW]
  • Ironodes arctus Traver, 1935 [CAN:NW;USA:NW]
    • Epeorus arctus (Traver, 1935) (comb.)
  • Ironodes californicus (Banks, 1910) [USA:NW,SW]
    • Epeorus californicus (Banks, 1910) (comb.)
    • Iron californicus Banks, 1910 (orig.)
  • Ironodes flavipennis Traver, 1935 [CAN:NW]
    • Epeorus flavipennis (Traver, 1935) (comb.)
  • Ironodes geminatus (Eaton, 1885) (dub.) [USA:NW]
    • Cinygma geminatum Eaton, 1885 (orig.)
    • Epeorus geminatus (Eaton, 1885) (comb.)
  • Ironodes lepidus Traver, 1935 [USA:NW,SW]
    • Epeorus lepidus (Traver, 1935) (comb.)
  • Ironodes nitidus (Eaton, 1885) [CAN:NW;MEX:SW;USA:FN,NW,SW]
    • Epeorus nitidus (Eaton, 1885) (comb.)
    • Iron nitidus Eaton, 1885 (orig.)
  • Leucrocuta aphrodite (McDunnough, 1926) [CAN:NE;USA:NE,SE,SW]
    • Ecdyonurus aphrodite (McDunnough, 1926) (comb.)
    • Heptagenia aphrodite McDunnough, 1926 (orig.)
  • Leucrocuta hebe (McDunnough, 1924) [CAN:FN,NE;USA:NE,NW,SE]
    • Ecdyonurus hebe (McDunnough, 1924) (comb.)
    • Heptagenia hebe McDunnough, 1924 (orig.)
  • Leucrocuta jewetti (Allen, 1966) [CAN:NE;USA:NW]
    • Ecdyonurus jewetti (Allen, 1966) (comb.)
    • Heptagenia jewetti Allen, 1966 (orig.)
  • Leucrocuta juno (McDunnough, 1924) [CAN:NE;USA:NE,SE]
    • Ecdyonurus juno (McDunnough, 1924) (comb.)
    • Heptagenia juno McDunnough, 1924 (orig.)
  • Leucrocuta maculipennis (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,NW,SE,SW]
    • Ecdyonurus maculipennis (Walsh, 1863) (comb.)
    • Ecdyurus maculipennis (Walsh, 1863) (comb.)
    • Heptagenia maculipennis Walsh, 1863 (orig.)
  • Leucrocuta minerva (McDunnough, 1924) [CAN:NE;USA:NE,SE]
    • Ecdyonurus minerva (McDunnough, 1924) (comb.)
    • Heptagenia minerva McDunnough, 1924 (orig.)
  • Leucrocuta petersi (Allen, 1966) [USA:NW,SW]
    • Ecdyonurus petersi (Allen, 1966) (comb.)
    • Heptagenia petersi Allen, 1966 (orig.)
  • Leucrocuta thetis (Traver, 1935) [USA:NE,SE]
    • Ecdyonurus thetis (Traver, 1935) (comb.)
    • Heptagenia thetis Traver, 1935 (orig.)
  • Leucrocuta umbratica (McDunnough, 1931) [CAN:NE;USA:NE,SE]
    • Ecdyonurus umbraticus (McDunnough, 1931) (comb.)
    • Heptagenia umbratica McDunnough, 1931 (orig.)
    • Heptagenia umbricata McDunnough, 1931 (spell.)
  • Leucrocuta walshi (McDunnough, 1926) [CAN:NE;USA:NE]
    • Ecdyonurus walshi (McDunnough, 1926) (comb.)
    • Heptagenia walshi McDunnough, 1926 (orig.)
  • Maccaffertium appaloosa McCafferty, 2011 [USA:SE]
  • Maccaffertium bednariki (McCafferty, 1981) [USA:SE]
    • Heptagenia bednariki (McCafferty, 1981) (comb.)
    • Stenonema bednariki McCafferty, 1981 (orig.)
  • Maccaffertium carlsoni (Lewis, 1974) [USA:SE]
    • Heptagenia carlsoni (Lewis, 1974) (comb.)
    • Stenonema carlsoni Lewis, 1974 (orig.)
  • Maccaffertium exiguum (Traver, 1933) [CAN:NE;USA:NE,SE]
    • Heptagenia exigua (Traver, 1933) (comb.)
    • Stenonema alabamae Traver, 1937 (syn.)
    • Stenonema exiguum Traver, 1933 (orig.)
    • Stenonema quinquespinum Lewis, 1974 (syn.)
  • Maccaffertium flaveolum (Pictet, 1843) (dub.) [CAN:NE]
    • Baetis flaveola Pictet, 1843 (orig.)
    • Heptagenia flaveola (Pictet, 1843) (comb.)
    • Stenonema flaveolum (Pictet, 1843) (comb.)
  • Maccaffertium ithaca (Clemens & Leonard, 1924) [CAN:NE;USA:NE,SE]
    • Ecdyonurus ithaca (Clemens & Leonard, 1924) (comb.)
    • Heptagenia ithaca Clemens & Leonard, 1924 (orig.)
    • Stenonema allegheniense Carle, 1977 (syn.)
    • Stenonema ithaca (Clemens & Leonard, 1924) (comb.)
  • Maccaffertium lenati (McCafferty, 1990) [USA:SE]
    • Stenonema lenati McCafferty, 1990 (orig.)
  • Maccaffertium luteum (Clemens, 1913) [CAN:NE;USA:NE,SE]
    • Ecdyonurus luteus (Clemens, 1913) (comb.)
    • Heptagenia lutea Clemens, 1913 (orig.)
    • Stenonema luteum (Clemens, 1913) (comb.)
  • Maccaffertium mediopunctatum arwini (Bednarik & McCafferty, 1979) [CAN:NE;USA:NE,SE,SW]
    • Heptagenia mediopunctata arwini (Bednarik & McCafferty, 1979) (comb.)
    • Stenonema mediopunctata arwini Bednarik & McCafferty, 1979 (orig.)
  • Maccaffertium mediopunctatum mediopunctatum (McDunnough, 1926) [CAN:NE;USA:NE,SE]
    • Ecdyonurus mediopunctatus McDunnough, 1926 (orig.)
    • Ecdyonurus nepotellus McDunnough, 1933 (syn.)
    • Heptagenia mediopunctata (McDunnough, 1926) (comb.)
    • Heptagenia mediopunctata mediopunctata (McDunnough, 1926) (comb.)
    • Stenonema mediopunctatum (McDunnough, 1926) (comb.)
    • Stenonema mediopunctatum mediopunctatum (McDunnough, 1926) (comb.)
    • Stenonema nepotellum (McDunnough, 1933) (syn.)
  • Maccaffertium meririvulanum (Carle & Lewis, 1978) [CAN:NE;USA:NE,SE]
    • Heptagenia meririvulana (Carle & Lewis, 1978) (comb.)
    • Stenonema meririvulanum Carle & Lewis, 1978 (orig.)
    • Stenonema sp. No. 3 Traver, 1933 (syn.)
  • Maccaffertium mexicanum integrum (McDunnough, 1924) [CAN:NE;MEX:SW;USA:NE,SE,SW]
    • Heptagenia integer McDunnough, 1924 (orig.)
    • Heptagenia mexicana integer McDunnough, 1924 (comb.)
    • Stenonema bellum Traver, 1933 (syn.)
    • Stenonema integrum (McDunnough, 1924) (comb.)
    • Stenonema metriotes Burks, 1953 (syn.)
    • Stenonema mexicanum integrum (McDunnough, 1924) (comb.)
    • Stenonema wabasha Daggy, 1945 (syn.)
  • Maccaffertium mexicanum mexicanum (Ulmer, 1920) [MEX:FS]
    • Heptagenia mexicana Ulmer, 1920 (orig.)
    • Heptagenia mexicana mexicana Ulmer, 1920 (stat.)
    • Stenonema mexicana (Ulmer, 1920) (comb.spell.)
    • Stenonema mexicanum mexicanum (Ulmer, 1920) (comb.)
  • Maccaffertium modestum (Banks, 1910) [CAN:NE;USA:NE,SE]
    • Ecdyonurus ruber McDunnough, 1926 (syn.)
    • Ecdyonurus rubromaculatus (Clemens, 1913) (syn.)
    • Epeorus modestus Banks, 1910 (orig.)
    • Heptagenia modesta (Banks, 1910) (comb.)
    • Heptagenia rubromaculata Clemens, 1913 (syn.)
    • Iron modestus (Banks, 1910) (comb.)
    • Stenonema annexum Traver, 1933 (syn.)
    • Stenonema modestum (Banks, 1910) (comb.)
    • Stenonema ruber (McDunnough, 1926) (syn.)
    • Stenonema rubromaculatum (Clemens, 1913) (syn.)
    • Stenonema rubrum (McDunnough, 1926) (syn.)
    • Stenonema varium Traver, 1933 (syn.)
  • Maccaffertium pudicum (Hagen, 1861) [USA:NE,SE]
    • Ecdyonurus pudicus (Hagen, 1861) (comb.)
    • Ephemera pudica Hagen, 1861 (orig.)
    • Heptagenia pudica (Hagen, 1861) (comb.)
    • Stenonema pudicum (Hagen, 1861) (comb.)
  • Maccaffertium pulchellum (Walsh, 1862) [CAN:NE;USA:NE,SE]
    • Ecdyonurus pulchellus (Walsh, 1862) (comb.)
    • Heptagenia luridipennnis (Burmeister, 1839) (id.)
    • Heptagenia pulchella (Walsh, 1862) (comb.)
    • Palingenia pulchella Walsh, 1862 (orig.)
    • Stenonema pulchellum (Walsh, 1862) (comb.)
  • Maccaffertium sinclairi (Lewis, 1979) [USA:SE]
    • Heptagenia sinclairi (Lewis, 1979) (comb.)
    • Stenonema sinclairi Lewis, 1979 (orig.)
  • Maccaffertium smithae (Traver, 1937) [CAN:NE;USA:NE,SE]
    • Heptagenia smithae (Traver, 1937) (comb.)
    • Stenonema smithae Traver, 1937 (orig.)
  • Maccaffertium terminatum placitum (Banks, 1910) [CAN:NE;USA:NE]
    • Ecdyonurus placita (Banks, 1910) (comb.)
    • Heptagenia placita Banks, 1910 (orig.)
    • Heptagenia terminata placita Banks, 1910 (comb.)
    • Stenonema placitum (Banks, 1910) (comb.)
    • Stenonema terminatum placitum (Banks, 1910) (comb.)
  • Maccaffertium terminatum terminatum (Walsh, 1862) [CAN:NE,NW:USA:NE,NW,SE,SW]
    • Ecdyonurus bipunctatus McDunnough, 1926 (syn.)
    • Ecdyonurus terminatus (Walsh, 1862) (comb.)
    • Heptagenia terminata (Walsh, 1862) (comb.)
    • Heptagenia terminata terminata (Walsh, 1862) (comb.)
    • Palingenia terminata Walsh, 1862 (orig.)
    • Stenonema ares Burks, 1953 (syn.)
    • Stenonema bipunctatum (McDunnough, 1926) (syn.)
    • Stenonema lepton Burks, 1946 (syn.)
    • Stenonema terminatum (Walsh, 1862) (comb.)
    • Stenonema terminatum terminatum (Walsh, 1862) (comb.)
  • Maccaffertium vicarium (Walker, 1853) [CAN:FN,NE,NW;USA:NE,SE]
    • Baetis tessellata Walker, 1853 (syn.)
    • Baetis vicaria Walker, 1853 (orig.)
    • Ecdyonurus fusca (Clemens, 1913) (syn.spell)
    • Ecdyonurus fuscum (Clemens, 1913) (syn.)
    • Ecdyonurus fuscus (Clemens, 1913) (syn.spell)
    • Ecdyonurus rivulicolus McDunnough, 1933 (syn.)
    • Ecdyonurus vicarius (Walker, 1853) (comb.)
    • Ecdyurus vicarius (Walker, 1853) (comb.)
    • Heptagenia fusca Clemens, 1913 (syn.)
    • Heptagenia vicaria (Walker, 1853) (comb.)
    • Stenonema fuscum (Clemens, 1913) (syn.)
    • Stenonema rivulicolum (McDunnough, 1933) (syn.)
    • Stenonema tessellata (Walker, 1853) (syn.)
    • Stenonema vicarium (Walker, 1853) (comb.)
  • Maccaffertium wudigeum McCafferty & Lenat, 2010 [USA:SE]
  • Macdunnoa brunnea Flowers, 1982 [USA:NE,SE]
    • Heptagenia brunnea (Flowers, 1982) (comb.)
  • Macdunnoa nipawinia Lehmkuhl, 1979 [CAN:NW]
    • Heptagenia nipawinia (Lehmkuhl, 1979) (comb.)
  • Macdunnoa persimplex (McDunnough, 1929) [CAN:NE;USA:NE,NW,SE]
    • Heptagenia persimplex McDunnough, 1929 (orig.)
  • Nixe dorothae Webb & McCafferty, 2011 [USA:NE]
  • Nixe flowersi McCafferty, 1982 [USA:NE,SE]
    • Ecdyonurus flowersi (McCafferty, 1982) (comb.)
  • Nixe horrida (McDunnough, 1926) [CAN:NE;USA:NE]
    • Ecdyonurus horridus (McDunnough, 1926) (comb.)
    • Heptagenia horrida McDunnough, 1926 (orig.)
  • Nixe inconspicua (McDunnough, 1924) [CAN:NE,NW;USA:NE,SE]
    • Ecdyonurus inconspicuus (McDunnough, 1924) (comb.)
    • Heptagenia inconspicua McDunnough, 1924 (orig.)
  • Nixe joernensis (Bengtsson, 1909) [CAN:NE]
    • Afghanurus dentatus (Braasch, 1979) (misid.)
    • Afghanurus flavomaculatus (Aro, 1928) (syn.)
    • Afghanurus joernensis (Aro, 1928) (comb.)
    • Afghanurus mongolicus (Bajkova & Varykhanova, 1978) (syn.)
    • Afghanurus stubbei (Braasch, 1979) (syn.)
    • Ecdyonurus flavomaculatus Aro, 1928 (syn.)
    • Ecdyonurus dentatus (Braasch, 1979) (misid.)
    • Ecdyonurus joernensis (Bengtsson, 1909) (comb.)
    • Ecdyonurus joernensis mongolicus (Bajkova & Varykhanova, 1978) (syn.)
    • Ecdyonurus KUb Yoon & Bae, 1984 (syn.)
    • Ecdyonurus mongolicus (Bajkova & Varykhanova, 1978) (syn.)
    • Ecdyonurus stubbei Braasch, 1979 (syn.)
    • Ecdyurus joernensis Bengtsson, 1909 (orig.)
    • Heptagenia dentata Braasch, 1979 (misid.)
    • Heptagenia joernensis (Bengtsson, 1909) (comb.)
    • Heptagenia mongolica Bajkova & Varykhanova, 1978 (syn.)
    • Nixe dentata (Braasch, 1979) (misid.)
    • Nixe mongolica (Bajkova & Varykhanova, 1978) (syn.)
    • Paracynigmula joernensis (Bengtsson, 1909) (comb.)
  • Nixe kennedyi (McDunnough, 1924) [USA:NW]
    • Ecdyonurus kennedyi (McDunnough, 1924) (comb.)
    • Heptagenia kennedyi McDunnough, 1924 (orig.)
  • Nixe lucidipennis (Clemens, 1913) [CAN:NE,NW:USA:NE,SE]
    • Ecdyonurus lucidipennis (Clemens, 1913) (comb.)
    • Ecdyurus lucidipennis Clemens, 1913 (orig.)
    • Heptagenia lucidipennis (Clemens, 1913) (comb.)
  • Nixe perfida (McDunnough, 1926) [CAN:NE;USA:NE,SE]
    • Ecdyonurus perfidus (McDunnough, 1926) (comb.)
    • Heptagenia perfida McDunnough, 1926 (orig.)
  • Nixe rusticalis (McDunnough, 1931) [CAN:NE,NW;USA:NE,SE]
    • Ecdyonurus rusticalis (McDunnough, 1931) (comb.)
    • Heptagenia rusticalis McDunnough, 1931 (orig.)
  • Nixe spinosa (Traver, 1933) [USA:SE]
    • Heptagenia spinosa Traver, 1933 (orig.)
  • Raptoheptagenia cruentata (Walsh, 1863) [CAN:NE,NW;USA:NE,NW,SE]
    • Heptagenia cruentata Walsh, 1863 (orig.)
    • Heptagenia reversalis McDunnough, 1924 (syn.)
    • Heptagenia patoka Burks, 1946 (syn.)
  • Rhithrogena amica Traver, 1935 [CAN:NE;USA:NE,SE]
  • Rhithrogena anomala McDunnough, 1928 [CAN:NE;USA:NE,SE]
  • Rhithrogena brunneotincta McDunnough, 1933 [CAN:NE;USA:NE]
  • Rhithrogena decora Day, 1954 [USA:NW,SW]
  • Rhithrogena exilis Traver, 1933 [USA:SE]
  • Rhithrogena fasciata Traver, 1933 [USA:SE]
  • Rhithrogena flavianula (McDunnough, 1924) [USA:NW,SW]
    • Heptagenia flavianula McDunnough, 1924 (orig.)
  • Rhithrogena fuscifrons Traver, 1933 [USA:SE]
  • Rhithrogena futilis McDunnough, 1934 [CAN:FN,NW;USA:FN,NW,SW]
  • Rhithrogena gaspeensis McDunnough, 1933 [CAN:NE]
  • Rhithrogena hageni Eaton, 1885 [CAN:NW;USA:NW,SW]
    • Heptagenia brunnea Hagen, 1875 (hom.: H. brunnea (Rambur, 1842))
    • Rhithrogena brunnea (Hagen, 1875) (hom.comb.)
    • Rhithrogena doddsi McDunnough, 1926 (syn.)
  • Rhithrogena impersonata (McDunnough, 1925) [CAN:NE;USA:NE,SE]
    • Heptagenia impersonata McDunnough, 1925 (orig.)
    • Rhithrogena sanguinea Ide, 1954 (syn.)
  • Rhithrogena ingalik Randolph & McCafferty, 2005 [USA:FN]
  • Rhithrogena jejuna Eaton, 1885 [CAN:FN,NE,NW;USA:NE]
    • Baetis fusca Walker, 1853 (hom.: B. fusca Burmeister, 1839)
    • Heptagenia fusca (Walker, 1853) (hom.comb.)
    • Rhithrogena fusca (Walker, 1853) (hom.comb.)
  • Rhithrogena manifesta Eaton, 1885 [CAN:NE;USA:NE,NW,SE]
    • Heptagenia manifesta (Eaton, 1885) (comb.)
    • Rhithrogena pellucida Daggy, 1945 (syn.)
  • Rhithrogena morrisoni (Banks, 1924) [CAN:NW;MEX:SW;USA:NW,SW]
    • Epeorus morrisoni Banks, 1924 (orig.)
    • Iron petulans Seemann, 1927 (syn.)
    • Rhithrogena petulans (Seemann, 1927) (syn.)
  • Rhithrogena notialis Allen & Cohen, 1977 [MEX:FS]
  • Rhithrogena plana Allen & Chao, 1978 [MEX:SW;USA:NW,SW]
    • Rhithrogena vitta Allen & Chao, 1978 (syn.)
  • Rhithrogena robusta Dodds, 1923 [CAN:NW;USA:FN,NW,SW]
  • Rhithrogena rubicunda Traver, 1937 [USA:SE]
  • Rhithrogena uhari Traver, 1933 [USA:NE,SE]
  • Rhithrogena undulata (Banks, 1924) [CAN:FN,NE,NW;USA:NE,NW,SW]
    • Epeorus undulata Banks, 1924 (spell.)
    • Epeorus undulatus Banks, 1924 (orig.)
  • Rhithrogena virilis McDunnough, 1934 [CAN:NW;USA:NW]
  • Spinadis simplex (Walsh, 1863) [CAN:NE;USA:NE,SE]
    • Anepeorus simplex (Walsh, 1863) (comb.)
    • Heptagenia simplex Walsh, 1863 (orig.)
    • Spinadis wallacei Edmunds & Jensen, 1974 (syn.)
  • Stenacron candidum (Traver, 1935) [CAN:NE;USA:NE,SE]
    • Heptagenia candida (Traver, 1935) (comb.)
    • Stenonema candidum Traver, 1935 (orig.)
  • Stenacron carolina (Banks, 1914) [CAN:NE;USA:NE,SE]
    • Ecdyonurus carolina (Banks, 1914) (comb.)
    • Heptagenia carolina Banks, 1914 (orig.)
    • Stenonema carolina (Banks, 1914) (comb.)
  • Stenacron floridense (Lewis, 1974) [USA:SE]
    • Heptagenia floridensis (Lewis, 1974) (comb.)
    • Stenonema floridense Lewis, 1974 (orig.)
  • Stenacron gildersleevei (Traver, 1935) [CAN:NE;USA:NE,SE]
    • Heptagenia gildersleevei (Traver, 1935) (comb.)
    • Stenonema gildersleevei Traver, 1935 (orig.)
  • Stenacron interpunctatum (Say, 1839) [CAN:NE,NW;USA:NE,NW,SE]
    • Baetis canadensis Walker, 1853 (syn.)
    • Baetis interpunctata Say, 1839 (orig.)
    • Ecdyonurus canadensis (Walker, 1853) (syn.)
    • Ecdyonurus frontalis (Banks, 1910) (syn.)
    • Ecdyonurus heterotarsalis McDunnough, 1933 (syn.)
    • Ecdyurus canadensis (Walker, 1853) (syn.)
    • Heptagenia canadensis (Walker, 1853) (syn.)
    • Heptagenia frontalis Banks, 1910 (syn.)
    • Heptagenia interpunctata (Say, 1839) (comb.)
    • Palingenia interpunctata (Say, 1839) (comb.)
    • Stenacron areion (Burks, 1953) (syn.)
    • Stenacron canadense (Walker, 1853) (syn.)
    • Stenacron frontale (Banks, 1910) (syn.)
    • Stenacron heterotarsale (McDunnough, 1933) (syn.)
    • Stenonema areion Burks, 1953 (syn.)
    • Stenonema affine Traver, 1933 (syn.)
    • Stenonema canadense (Walker, 1853) (syn.)
    • Stenonema conjunctum Traver, 1935 (syn.)
    • Stenonema frontale (Banks, 1910) (syn.)
    • Stenonema heterotarsale (McDunnough, 1933) (syn.)
    • Stenonema interpunctatum (Say, 1839) (comb.)
    • Stenonema majus Traver, 1935 (syn.)
    • Stenonema ohioense Traver, 1935 (syn.)
    • Stenonema proximum Traver, 1935 (syn.)
  • Stenacron minnetonka (Daggy, 1945) [USA:NE,SE]
    • Heptagenia minnetonka (Daggy, 1945) (comb.)
    • Stenonema minnetonka Daggy, 1945 (orig.)
  • Stenacron pallidum (Traver, 1933) [USA:NE,SE]
    • Heptagenia pallida (Traver, 1933) (comb.)
    • Stenonema pallidum Traver, 1933 (orig.)
  • Stenonema femoratum (Say, 1823) [CAN:FN,NE,NW;USA:NE,SE,SW]
    • Baetis femorata Say, 1823 (orig.)
    • Ecdyonurus femoratus (Say, 1823) (comb.)
    • Ecdyonurus tripunctatus (Banks, 1910) (syn)
    • Heptagenia femorata (Say, 1823) (comb.)
    • Heptagenia tripunctata Banks, 1910 (syn.)
    • Siphlurus femoratus (Say, 1823) (comb.)
    • Stenonema birdi Traver, 1935 (syn.)
    • Stenonema scitulum Traver, 1935 (syn.)
    • Stenonema tripunctatum (Banks, 1910) (syn.)
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ISONYCHIIDAE

  • Isonychia arida (Say, 1839) [USA:NE,SE]
    • Baetis arida Say, 1839 (orig.)
    • Isonychia pictipes Traver, 1934 (syn.)
  • Isonychia berneri Kondratieff & Voshell, 1984 [USA:SE]
  • Isonychia bicolor (Walker, 1853) [CAN:NE;USA:NE,SE]
    • Chirotonetes albomanicatus Needham, 1905 (syn.)
    • Isonychia albomanicata (Needham, 1905) (syn.)
    • Isonychia christina Traver, 1934 (syn.)
    • Isonychia circe Traver, 1934 (syn.)
    • Isonychia fattigi Traver, 1934 (syn.)
    • Isonychia harperi Traver, 1934 (syn.)
    • Isonychia matilda Traver, 1934 (syn.)
    • Isonychia pacoleta Traver, 1932 (syn.)
    • Isonychia sadleri Traver, 1934 (syn.)
    • Palingenia bicolor Walker, 1853 (orig.)
    • Siphlurus bicolor (Walker, 1853) (comb.)
  • Isonychia campestris McDunnough, 1931 [CAN:NE,NW;USA:NW]
    • Isonychia sicca campestris McDunnough, 1931 (orig.)
  • Isonychia diversa Traver, 1934 [USA:SE] (recently extinct)
  • Isonychia georgiae McDunnough, 1931 [USA:SE]
    • Isonychia annulata Traver, 1932 (syn.)
    • Isonychia notata Traver, 1932 (syn.)
    • Isonychia thalia Traver, 1934 (syn.)
  • Isonychia hoffmani Kondratieff & Voshell, 1984 [USA:SE]
  • Isonychia intermedia (Eaton, 1885) [MEX:SW;USA:SW]
    • Chirotonetes intermedius Eaton, 1885 (orig.)
  • Isonychia obscura Traver, 1932 [CAN:NE;USA:NE,SE]
  • Isonychia rufa McDunnough, 1931 [CAN:NE,NW;USA:NE,NW,SE]
  • Isonychia sayi Burks, 1953 [CAN:NE;USA:NE,SE]
  • Isonychia serrata Traver, 1932 [USA:SE]
  • Isonychia sicca (Walsh, 1862) [CAN:NE;MEX:FS,SW:USA:NE,NW,SE,SW]
    • Baetis sicca Walsh, 1862 (orig.)
    • Chirotonetes mancus (Eaton, 1871) (syn.)
    • Chirotonetes siccus (Walsh, 1862) (comb.)
    • Isonychia edmundsi Kondratieff & Voshell, 1984 (syn.)
    • Isonychia manca Eaton, 1871 (syn.)
    • Isonychia sicca manca Eaton, 1871 (syn.)
    • Isonychia sicca sicca (Walsh, 1862) (stat.)
    • Siphlurus siccus (Walsh, 1862) (comb.)
  • Isonychia similis Traver, 1932 [USA:SE]
    • Isonychia aurea Traver, 1932 (syn.)
  • Isonychia tusculanensis Berner, 1948 [USA:SE]
  • Isonychia velma Needham, 1932 [USA:NW]
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LEPTOHYPHIDAE

  • Ableptemetes dicinctus (Allen & Brusca, 1973) [MEX:FS]
    • Leptohyphes dicinctus Allen & Brusca, 1973 (orig.)
    • Tricorythopsis dicinctus (Allen & Brusca, 1973) (comb.)
  • Allenhyphes vescus (Allen, 1978) [MEX:FS,SW;USA:SW]
    • Allenhyphes michaeli (Allen, 1978) (syn.)
    • Leptohyphes michaeli Allen, 1978 (syn.)
    • Leptohyphes vescus Allen, 1978 (orig.)
  • Asioplax dolani (Allen, 1967) [USA:SE]
    • Leptohyphes dolani Allen, 1967 (orig.)
  • Asioplax edmundsi (Allen, 1967) [CAN:NW;USA:NW,SW]
    • Asioplax corpulenta (Kilgore & Allen, 1973) (syn.)
    • Tricorythodes corpulentus Kilgore & Allen, 1973 (syn.)
    • Tricorythodes edmundsi Allen, 1967 (orig.)
  • Asioplax numinuh Wiersema, McCafferty & Baumgardner, 2001 [MEX:FS,SW;USA:SW]
  • Asioplax texana (Traver, 1935) [MEX:SW;USA:SE,SW]
    • Tricorythodes texanus Traver, 1935 (orig.)
  • Homoleptohyphes dimorphus (Allen, 1967) [MEX:SW;USA:NW,SW]
    • Tricorythodes dimorphus Allen, 1967 (orig.)
  • Homoleptohyphes mirus (Allen, 1967) [MEX:SW;USA:SW]
    • Leptohyphes baumanni Kilgore & Allen, 1967 (syn.)
    • Leptohyphes mirus Allen, 1967 (orig.)
  • Homoleptohyphes quercus (Kilgore & Allen, 1973) [USA:SW]
    • Leptohyphes quercus Kilgore & Allen, 1973 (orig.)
  • Leptohyphes alleni Brusca, 1971 [MEX:FS]
  • Leptohyphes apache Allen, 1967 [MEX:FS,SW;USA:NW,SW]
    • Leptohyphes hispidus Allen & Brusca, 1973 (syn.)
    • Leptohyphes lumas Allen & Brusca, 1973 (syn.)
    • Leptohyphes spiculatus Allen & Brusca, 1973 (syn.)
    • Leptohyphes succinus Allen, 1978 (syn.)
  • Leptohyphes berneri Traver, 1958 [MEX:FS]
  • Leptohyphes ferruginus Allen & Brusca, 1973 [MEX:FS;USA:SW]
    • Leptohyphes ferrugineus Allen & Brusca, 1973 (spell.)
    • Leptohyphes piraticus Allen, 1978 (syn.)
  • Leptohyphes lestes Allen & Brusca, 1973 [MEX:FS,SW;USA:SW]
  • Leptohyphes musseri Allen, 1967 [MEX:FS,SW]
    • Leptohyphes brunneus Allen & Brusca, 1973 (syn.)
  • Leptohyphes nigripunctum Traver, 1943 [MEX:FS]
    • Leptohyphes nigripunctatum Traver, 1943 (spell.)
    • Leptohyphes nigripunctus Traver, 1943 (spell.)
  • Leptohyphes peterseni Ulmer, 1920 [MEX:FS]
  • Leptohyphes pilosus Allen & Brusca, 1973 [MEX:FS]
  • Leptohyphes sabinas Traver, 1958 [MEX:FS,SW;USA:SW]
    • Leptohyphes castaneus Allen, 1967 (syn.)
    • Leptohyphes consortis Allen & Brusca, 1973 (syn.)
    • Leptohyphes tarsos Allen & Murvosh, 1987 (syn.)
  • Leptohyphes zalope Traver, 1958 [MEX:FS,SW:USA:SW]
    • Leptohyphes vulturnus Allen, 1978 (syn.)
    • Leptohyphes zelus Allen, 1978 (syn.)
  • Tricoryhyphes condylus (Allen, 1967) [MEX:SW;USA:NW,SW]
    • Tricorythodes condylus Allen, 1967 (orig.)
  • Tricoryhyphes mulaiki (Traver, 1959) [MEX:FS,SW;USA:SW]
    • Tricorythodes mulaiki Traver, 1959 (orig.)
  • Tricorythodes albilineatus Berner, 1946 [USA:NE,SE,SW]
  • Tricorythodes allectus (Needham, 1905) [CAN:NE;USA:NE,SE]
    • Caenis allecta Needham, 1905 (orig.)
    • Tricorythodes atratus (McDunnough, 1923) (syn.)
    • Tricorythodes peridius Burks, 1953 (syn.)
    • Tricorythus allectus (Needham, 1905) (comb.)
    • Tricorythus atratus McDunnough, 1923 (syn.)
  • Tricorythodes cobbi Alba-Tercedor & Flannagan, 1995 [CAN:NE;USA:NE]
  • Tricorythodes comus Traver, 1959 [MEX:FS]
  • Tricorythodes curvatus Allen, 1977 [USA:SE,SW]
  • Tricorythodes explicatus (Eaton, 1892) [MEX:FS,SW;CAN:NE,NW;USA:NE,NW,SW]
    • Tricorythodes fallacina McDunnough, 1939 (syn.)
    • Tricorythodes fallax Traver, 1935 (syn.)
    • Tricorythodes minutus Traver, 1935 (syn.)
    • Tricorythus explicatus Eaton, 1892 (orig.)
  • Tricorythodes fictus Traver, 1935 [MEX:SW,FS;USA:NE,NW,SW]
    • Tricorythodes angulatus Traver, 1959 (syn.)
  • Tricorythodes mosegus Alba-Tercedor & Flannagan, 1995 [CAN:NE;USA:NE]
    • Tricorythodes mosequs Alba-Tercedor & Flannagan, 1995 (spell.)
  • Tricorythodes notatus Allen & Brusca, 1973 [MEX:FS]
  • Tricorythodes robacki (Allen, 1967) [USA:NE,SE,SW]
    • Leptohyphes robacki Allen, 1967 (orig.)
  • Tricorythodes sordidus Allen, 1967 [MEX:FS,SW]
  • Tricorythodes stygiatus McDunnough, 1931 [CAN:NE;USA:NE,SE]
  • Tricorythodes ulmeri Allen & Brusca, 1973 [MEX:FS,SW]
  • Vacupernius packeri (Allen, 1967) [MEX:FS,SW;USA:SW]
    • Leptohyphes packeri Allen, 1967 (orig.)
    • Leptohyphes paraguttatus Allen, 1978 (syn.)
    • Leptohyphes phalarobranchus Kilgore & Allen, 1973 (syn.)
    • Vacupernius paraguttatus (Allen, 1978) (syn.)
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LEPTOPHLEBIIDAE

  • Choroterpes albiannulata McDunnough, 1924 [CAN:NW;USA:NW]
  • Choroterpes basalis (Banks, 1900) [CAN:NE;USA:NE,SE]
    • Choroterpes ferruginea Traver, 1934 (syn.)
    • Choroterpes fusca Spieth, 1938 (syn.)
    • Choroterpes hubbelli Berner, 1946 (syn.)
    • Leptophlebia basalis Banks, 1900 (orig.)
  • Choroterpes inornata Eaton, 1892 [MEX:FS,SW;USA:NW,SW]
    • Choroterpes oaxacaensis Brusca & Allen, 1973 (syn.)
  • Choroterpes terratoma Seemann, 1927 [USA:NW,SW]
  • Choroterpes ungulus Lugo-Ortiz & McCafferty, 1996 [MEX:FS]
  • Farrodes flavipennis Dominguez, Molineri & Peters, 1996 [MEX:SW]
  • Farrodes maya Dominguez, 1999 [MEX:FS]
  • Farrodes mexicanus Dominguez, 1999 [MEX:FS;USA:SW]
  • Farrodes otiesa Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW]
  • Farrodes reevesi Randolph & McCafferty, 2001 [MEX:FS]
  • Farrodes texanus Davis, 1987 [MEX:SW;USA:SW]
  • Farrodes tulija Dominguez, Molineri & Peters, 1996 [MEX:FS]
  • Habrophlebia vibrans Needham, 1907 [CAN:NE;USA:NE,SE]
    • Habrophlebia jocosa Banks, 1914 (syn.)
    • Habrophlebia pusilla Traver, 1932 (syn.)
  • Habrophlebiodes americana (Banks, 1903) [CAN:NE;USA:NE,SE]
    • Choroterpes betteni Needham, 1908 (syn.)
    • Habrophlebia americana Banks, 1903 (orig.)
    • Habrophlebiodes betteni (Needham, 1908) (syn.comb.)
    • Leptophlebia betteni (Needham, 1908) (syn.comb.)
  • Habrophlebiodes annulata Traver, 1934 [USA:SE]
  • Habrophlebiodes brunneipennis Berner, 1946 [USA:SE]
  • Habrophlebiodes celeteria Berner, 1975 [USA:SE]
  • Hydrosmilodon primanus (Eaton, 1892) [MEX:FS]
    • Thraulus primanus Eaton, 1892 (orig.)
    • Traverella primanus (Eaton, 1892) (comb.)
    • Traverella primana (Eaton, 1892) (spell.)
  • Leptophlebia bradleyi Needham, 1932 [CAN:NE;USA:NE,SE,SW]
    • Paraleptophlebia bradleyi (Needham, 1932) (comb.)
  • Leptophlebia cupida (Say, 1823) [CAN:NE,NW;USA:NE,NW,SE]
    • Baetis ignava Hagen, 1861 (syn.)
    • Blasturus austrinus Traver, 1932 (syn.)
    • Blasturus collinus Traver, 1932 (syn.)
    • Blasturus concinnus (Walker, 1853) (syn.)
    • Blasturus cupidus (Say, 1823) (comb.)
    • Blasturus gravastellus Eaton, 1884 (syn.)
    • Cloe quebecensis Provancher, 1876 (syn.)
    • Ephemera cupida Say, 1823 (orig.)
    • Ephemera hebes Walker, 1853 (syn.)
    • Ephemerella quebecensis (Provancher, 1876) (syn.)
    • Heptagenia quebecensis (Provancher, 1876) (syn.)
    • Leptophlebia austrina (Traver, 1932) (syn.)
    • Leptophlebia collina (Traver, 1932) (syn.)
    • Leptophlebia concinna (Walker, 1853) (syn.)
    • Leptophlebia gravastella (Eaton, 1884) (syn.)
    • Leptophlebia hebes (Walker, 1853) (syn.)
    • Leptophlebia ignava (Hagen, 1861) (syn.)
    • Leptophlebia pallipes (Walker, 1853) (syn.)
    • Palingenia concinna Walker, 1853 (syn.)
    • Palingenia pallipes Walker, 1853 (syn.)
    • Potamanthus concinnus (Walker, 1853) (syn.)
    • Potamanthus cupidus (Say, 1823) (comb.)
  • Leptophlebia intermedia (Traver, 1932) [USA:NE,SE]
    • Blasturus grandis Traver, 1932 (syn.)
    • Blasturus intermedius Traver, 1932 (orig.)
    • Leptophlebia grandis (Traver, 1932) (syn.)
  • Leptophlebia johnsoni McDunnough, 1924 [CAN:NE;USA:NE,SE]
    • Blasturus gracilis Traver, 1932 (syn.)
    • Leptophlebia gracilis (Traver, 1932) (syn.)
  • Leptophlebia konza Burian, 2001 [USA:NE]
  • Leptophlebia nebulosa (Walker, 1853) [CAN:FN,NE,NW;USA:NE,NW,SE]
    • Blasturus nebulosus (Walker, 1853) (comb.)
    • Palingenia nebulosa Walker, 1853 (orig.)
    • Potamanthus nebulosus (Walker, 1853) (comb.)
    • Potamanthus odonatus Walsh, 1862 (syn.)
  • Leptophlebia pacifica (McDunnough, 1933) [USA:NW]
    • Blasturus pacificus McDunnough, 1933 (orig.)
    • Blasturus vibex Traver, 1934 (syn.)
    • Leptophlebia vibex (Traver, 1934) (syn.)
  • Neochoroterpes kossi (Allen, 1974) [USA:SW]
    • Choroterpes kossi Allen, 1974 (orig.)
    • Choroterpes sp. 1 Lugo-Ortiz & McCafferty, 1995 (syn.)
  • Neochoroterpes nanita (Traver, 1934) [USA:SW]
    • Choroterpes crocatus Allen, 1974 (syn.)
    • Choroterpes manita Traver, 1934 (spell.)
    • Choroterpes nanita Traver, 1934 (orig.)
    • Neochoroterpes crocatus (Allen, 1974) (syn.)
  • Neochoroterpes oklahoma (Traver, 1934) [MEX:FS,SW;USA:NE,NW,SW]
    • Choroterpes mexicana Allen, 1974 (syn.)
    • Choroterpes mexicanus Allen, 1974 (spell.)
    • Choroterpes oklahoma Traver, 1934 (orig.)
    • Choroterpes sp. 2 Lugo-Ortiz & McCafferty, 1995 (syn.)
  • Neochoroterpes orientalis Henry, 1993 [MEX:FS]
  • Paraleptophlebia adoptiva (McDunnough, 1929) [CAN:NE,NW;USA:NE,NW,SE]
    • Leptophlebia adoptiva McDunnough, 1929 (orig.)
  • Paraleptophlebia altana Kilgore & Allen, 1973 [USA:NW,SW]
  • Paraleptophlebia aquilina Harper & Harper, 1986 [USA:NW]
  • Paraleptophlebia assimilis (Banks, 1914) [CAN:NE;USA:NE,SE]
    • Leptophlebia assimilis Banks, 1914 (orig.)
  • Paraleptophlebia associata (McDunnough, 1924) [USA:NW,SW]
    • Leptophlebia associata McDunnough, 1924 (orig.)
    • Paraleptophlebia compar Traver, 1934 (syn.)
  • Paraleptophlebia bicornuta (McDunnough, 1926) [CAN:NW;USA:NW]
    • Leptophlebia bicornuta McDunnough, 1926 (orig.)
  • Paraleptophlebia brunneipennis (McDunnough, 1924) [CAN:NW;USA:NW]
    • Leptophlebia brunneipennis McDunnough, 1924 (orig.)
  • Paraleptophlebia cachea Day, 1954 [USA:NW]
  • Paraleptophlebia calcarica Rowbotham & Allen, 1988 [USA:NE,SE]
    • Paraleptophlebia calcarita Robotham & Allen, 1988 (spell.)
    • Paraleptophlebia calcarica Robotham & Allen, 1988 (orig.author.spell.)
  • Paraleptophlebia californica Traver, 1934 [USA:SW]
  • Paraleptophlebia clara (McDunnough, 1933) [USA:NW]
    • Leptophlebia clara McDunnough, 1933 (orig.)
  • Paraleptophlebia debilis (Walker, 1853) [CAN:FN,NE,NW;USA:FN,NE,NW,SE,SW]
    • Baetis debilis Walker, 1853 (orig.)
    • Leptophlebia debilis (Walker, 1853) (comb.)
    • Leptophlebia mollis (Hagen, 1861) (id.)
    • Leptophlebia separata Ulmer, 1920 (invalid renam.)
  • Paraleptophlebia falcula Traver, 1934 [USA:NW]
  • Paraleptophlebia georgiana Traver, 1934 [USA:SE]
  • Paraleptophlebia gregalis (Eaton, 1884) [CAN:NW;USA:NW,SW]
    • Leptophlebia gregalis Eaton, 1884 (orig.)
    • Leptophlebia invalida McDunnough, 1926 (syn.)
    • Paraleptophlebia invalida (McDunnough, 1926) (syn.)
  • Paraleptophlebia guttata (McDunnough, 1924) [CAN:FN,NE;USA:NE,SE]
    • Leptophlebia guttata McDunnough, 1924 (orig.)
  • Paraleptophlebia helena Day, 1952 [USA:NW]
  • Paraleptophlebia heteronea (McDunnough, 1924) [CAN:NW;USA:NW,SW]
    • Leptophlebia heteronea McDunnough, 1924 (orig.)
  • Paraleptophlebia jeanae Berner, 1955 [USA:NE,SE]
  • Paraleptophlebia jenseni McCafferty & Kondratieff, 1999 [USA:NW]
  • Paraleptophlebia kirchneri Kondratieff & Durfee, 1994 [USA:SE]
  • Paraleptophlebia memorialis (Eaton, 1884) [CAN:NW;MEX:SW;USA:NW,SW]
    • Leptophlebia memorialis Eaton, 1884 (renam.)
    • Leptophlebia pallipes Hagen, 1875 (hom.: L. pallipes (Walker, 1853))
    • Paraleptophlebia pallipes (Hagen, 1875) (hom.comb.)
  • Paraleptophlebia moerens (McDunnough, 1924) [CAN:FN,NE,NW;USA:NE,SE]
    • Leptophlebia moerens McDunnough, 1924 (orig.)
  • Paraleptophlebia mollis (Eaton, 1871) [CAN:NE;USA:NE,NW,SE]
    • Cloe mollis Hagen, 1861 (nom. nud.)
    • Leptophlebia mollis Eaton, 1871 (orig.)
    • Leptophlebia mollis Hagen, 1861 (nom. nud.)
  • Paraleptophlebia ontario (McDunnough, 1926) [CAN:NE;USA:NE,SE]
    • Leptophlebia ontario McDunnough, 1926 (orig.)
  • Paraleptophlebia packii (Needham, 1927) [USA:NW]
    • Leptophlebia packii Needham, 1927 (orig.)
    • Paraleptophlebia packi (Needham, 1927) (spell.)
  • Paraleptophlebia placeri Mayo, 1939 [USA:NW]
  • Paraleptophlebia praepedita (Eaton, 1884) [CAN:NE,NW;USA:NE,NW,SE]
    • Leptophlebia praepedita Eaton, 1884 (orig.)
  • Paraleptophlebia quisquilia Day, 1952 [USA:NW]
  • Paraleptophlebia rufivenosa (Eaton, 1884) [CAN:NW;USA:NW,SW]
    • Leptophlebia rufivenosa Eaton, 1884 (orig.)
  • Paraleptophlebia sculleni Traver, 1934 [USA:NW]
  • Paraleptophlebia sticta Burks, 1953 [USA:NE]
  • Paraleptophlebia strigula (McDunnough, 1932) [CAN:NE;USA:NE,SE]
    • Leptophlebia strigula McDunnough, 1932 (orig.)
  • Paraleptophlebia swannanoa (Traver, 1932) [USA:SE]
    • Leptophlebia swannanoa Traver, 1932 (orig.)
  • Paraleptophlebia temporalis (McDunnough, 1926) [CAN:NW;USA:NW,SW]
    • Leptophlebia temporalis McDunnough, 1926 (orig.)
  • Paraleptophlebia traverae McCafferty & Kondratieff, 1999 [USA:NW]
  • Paraleptophlebia vaciva (Eaton, 1884) [CAN:NW;USA:FN,NW]
    • Leptophlebia vaciva Eaton, 1884 (orig.)
  • Paraleptophlebia volitans (McDunnough, 1924) [CAN:NE;USA:NE,SE]
    • Leptophlebia volitans McDunnough, 1924 (orig.)
  • Paraleptophlebia zayante Day, 1952 [USA:NW]

  • Thraulodes brunneus Koss, 1966 [MEX:FS,SW;USA:SW]
    • Thraulodes sp. A Allen & Brusca, 1978 (syn.)
  • Thraulodes cryptodrilus Nieto & Dominguez, 2001 [MEX:FS]
  • Thraulodes eccentricus Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW]
    • Thraulodes sp. B Allen & Brusca, 1978 (syn.)
  • Thraulodes ephippiatus Traver & Edmunds, 1967 [MEX:FS]
  • Thraulodes gonzalesi Traver & Edmunds, 1967 [MEX:FS,SW;USA:NW,SW]
    • Thraulodes salinus Kilgore & Allen, 1973 (syn.)
  • Thraulodes hilaris (Eaton), 1892 [MEX:FS]
    • Thraulus hilaris Eaton, 1892 (orig.)
  • Thraulodes humeralis Navas, 1935 [MEX:FS]
  • Thraulodes lunatus Traver & Edmunds, 1967 [MEX:FS,SW]
  • Thraulodes mexicanus (Eaton, 1884) [MEX:FS]
    • Thraulus mexicanus Eaton, 1884 (orig.)
  • Thraulodes pacaya McCafferty, Baumgardner & Guenther, 2004 [MEX:FS,SW]
    • Thraulodes sp. C. Allen & Brusca, 1978 (syn.)
  • Thraulodes packeri Traver & Edmunds, 1967 [MEX:FS,SW]
  • Thraulodes spangleri Traver & Edmunds, 1967 [MEX:FS]
  • Thraulodes speciosus Traver, 1934 [MEX:FS,SW;USA:SW]
    • Thraulodes arizonicus McDunnough, 1942 (syn.)
  • Thraulodes tenulineus Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;USA:SW]
    • Thraulodes sp. D Allen & Brusca, 1978 (syn.)
  • Thraulodes zonalis Traver & Edmunds, 1967 [MEX:FS]
  • Traverella albertana (McDunnough, 1931) [CAN:NW;MEX:FS,SW;USA:NE,NW,SW]
    • Thraulus albertanus McDunnough, 1931 (orig.)
    • Traverella castanea Kilgore & Allen, 1973 (syn.)
    • Traverella sp. A Allen, 1973 (syn.)
  • Traverella lewisi Allen, 1973 [USA:NE,NW,SE]
  • Traverella longifrons Lugo-Ortiz & McCafferty, 1996 [MEX:FS]
    • Traverella sp. B Allen, 1973 (syn.)
  • Traverella presidiana (Traver, 1934) [MEX:FS,SW;USA:SW]
    • Thraulus presidianus Traver, 1934 (orig.)
  • Traverella promifrons Lugo-Ortiz & McCafferty, 1996 [MEX:FS,SW;USA:SW]
    • Traverella sp. C Allen, 1973 (syn.)
  • Traverella sallei (Navas, 1935) [MEX]
    • Thraulus sallei Navas, 1935 (orig.)
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METRETOPODIDAE

  • Metretopus alter Bengtsson, 1930 [USA:FN]
  • Metretopus borealis (Eaton, 1871) [CAN:FN,NE,NW;USA:NE]
    • Heptagenia borealis Eaton, 1871 (orig.)
    • Metretopus norvegicus Eaton, 1901 (syn.)
    • Rhithrogena borealis (Eaton, 1871) (comb.)

  • Siphloplecton basale (Walker, 1853) [CAN:NE,NW;USA:NE,SE]
    • Baetis basalis Walker, 1853 (orig.)
    • Heptagenia basalis (Walker, 1853) (comb.)
    • Siphloplecton basalis (Walker, 1853) (spell.)
    • Siphloplecton flexus (Clemens, 1913) (syn.)
    • Siphloplecton signatum Traver, 1932 (syn.)
    • Siphlurus flexus Clemens, 1913 (syn.)
  • Siphloplecton brunneum Berner, 1978 [USA:SE]
  • Siphloplecton costalense Spieth, 1938 [USA:NE,SE]
  • Siphloplecton fuscum Berner, 1978 [USA:SE]
  • Siphloplecton interlineatum (Walsh, 1863) [CAN:FN,NE,NW;USA:NE,SE]
    • Baetis femorata Walsh, 1862 (hom.: B. femorata Say, 1823)
    • Baetis interlineata Walsh, 1863 (renam.)
  • Siphloplecton simile Berner, 1978 [USA:SE]
  • Siphloplecton speciosum Traver, 1932 [USA:SE]
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NEOEPHEMERIDAE

  • Neoephemera bicolor McDunnough, 1925 [CAN:NE;USA:NE,SE]
    • Neoephemera sp. A Jacobus & McCafferty, 2002 (syn.)
  • Neoephemera compressa Berner, 1956 [USA:SE]
  • Neoephemera purpurea (Traver, 1931) [USA:SE]
    • Oreianthus purpureus Traver, 1931 (orig.)
  • Neoephemera youngi Berner, 1953 [USA:SE]
    • Oreianthus sp. 1 Traver, 1937 (syn.)
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OLIGONEURIIDAE

  • Homoeoneuria alleni Pescador & Peters, 1980 [MEX:SW;USA:NE,NW,SW]
  • Homoeoneuria ammophila (Spieth, 1938) [USA:NE,NW]
    • Oligoneuria ammophila Spieth, 1938 (orig.)
  • Homoeoneuria cahabensis Pescador & Peters, 1980 [USA:SE]
  • Homoeoneuria dolani Edmunds, Berner & Traver, 1958 [USA:SE]
  • Homoeoneuria salviniae Eaton, 1881 [MEX:FS]
  • Lachlania dencyanna Koss, 1970 [USA:SW]
    • Lachlania dencyannae Koss, 1970 (spell.)
  • Lachlania fusca (Navas, 1924) [MEX:FS]
  • Lachlania iops Allen & Cohen, 1977 [MEX:FS,SW]
  • Lachlania saskatchewanensis Ide, 1941 [CAN:NW;MEX:SW;USA:NE,NW,SW]
    • Lachlania powelli Edmunds, 1951 (syn.)
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PALINGENIIDAE

  • Pentagenia robusta McDunnough, 1926 [USA:NE,SE] (recently extinct)
  • Pentagenia vittigera (Walsh, 1862) [CAN:NE;USA:NE,SE,SW]
    • Palingenia vittigera Walsh, 1862 (orig.)
    • Pentagenia quadripunctata Walsh, 1863 (syn.)
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POLYMITARCYIDAE

  • Campsurus cuspidatus Eaton, 1871 [MEX:FS,SW]
  • Campsurus decoloratus (Hagen, 1861) [MEX:SW;USA:SW]
    • Hexagenia decolorata (Hagen, 1861) (comb.)
    • Palingenia decolorata Hagen, 1861 (orig.)

  • Ephoron album (Say, 1824) [CAN:NE,NW;USA:NE,NW,SE]
    • Baetis alba Say, 1824 (spell.)
    • Baetis albus Say, 1824 (orig.)
    • Palingenia alba (Say, 1824) (comb.)
    • Polymitarcys albus (Say, 1824) (comb.)
  • Ephoron leukon Williamson, 1802 [CAN:NE;USA:NE,SE,SW]
  • Tortopus circumfluus Ulmer, 1942 [USA:SW]
  • Tortopsis primus (McDunnough, 1924) [CAN:NE;MEX:SW;USA:NE,SE,SW]
    • Campsurus manitobensis Ide, 1941 (syn.)
    • Campsurus primus McDunnough, 1924 (orig.)
    • Tortopus manitobensis (Ide, 1941) (syn.)
    • Tortopus primus (McDunnough, 1924) (comb.)
  • Tortopsis puella (Pictet, 1843) [USA:SE,SW]
    • Campsurus puella (Pictet, 1843) (comb.)
    • Campsurus incertus Traver, 1935 (syn.)
    • Palingenia puella Pictet, 1843 (orig.)
    • Tortopus incertus (Traver, 1935) (syn.)
    • Tortopus puella (Pictet, 1843) (comb.)
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POTAMANTHIDAE

  • Anthopotamus distinctus (Traver, 1935) [CAN:NE;USA:NE,SE]
    • Potamanthus distinctus Traver, 1935 (orig.)
  • Anthopotamus myops (Walsh, 1863) [CAN:NE;USA:NE,SE]
    • Anthopotamus inequalis (Needham, 1909) (syn.)
    • Anthopotamus rufous (Argo, 1927) (syn.)
    • Ephemera myops Walsh, 1863 (orig.)
    • Potamanthus inequalis Needham, 1909 (syn.)
    • Potamanthus medius Banks, 1908 (syn.)
    • Potamanthus myops (Walsh, 1863) (comb.)
    • Potamanthus rufous Argo, 1927 (syn.)
    • Potamanthus rufus Argo, 1927 (syn.)
  • Anthopotamus neglectus disjunctus Bae & McCafferty, 1991 [USA:SE]
  • Anthopotamus neglectus neglectus (Traver, 1935) [CAN:NE;USA:NE]
    • Anthopotamus neglectus (Traver, 1935) (comb.)
    • Potamanthus neglectus Traver, 1935 (orig.)
  • Anthopotamus verticis (Say, 1839) [CAN:NE;USA:NE,NW,SE]
    • Anthopotamus diaphanus (Needham, 1907) (syn.)
    • Anthopotamus walkeri (Ide, 1935) (syn.)
    • Baetis verticis Say, 1839 (orig.)
    • Ecdyurus verticis (Say, 1839) (comb.)
    • Ephemera flaveola Walsh, 1862 (syn.)
    • Heptagenia verticis (Say, 1839) (comb.)
    • Potamanthus betteni Morgan, 1913 (syn.)
    • Potamanthus diaphanus Needham, 1907 (syn.)
    • Potamanthus flaveola (Walsh, 1862) (syn.)
    • Potamanthus verticis (Say, 1839) (comb.)
    • Potamanthus walkeri Ide, 1935 (syn.)
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PSEUDIRONIDAE

  • Pseudiron centralis McDunnough, 1931 [CAN:NE,NW;USA:NE,NW,SE]
    • Pseudiron meridionalis Traver, 1935 (syn.)
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SIPHLONURIDAE

  • Edmundsius agilis Day, 1953 [USA:NW,SW]
  • Parameletus chelifer Bengtsson, 1908 [CAN:FN,NE,NW;USA:FN]
    • Eatonia borealis Bengtsson, 1904 (nom. nud.)
    • Palmenia fennica Aro, 1910 (syn.)
    • Potameis elegans Bengtsson, 1909 (syn.)
    • Sparrea norvegica Esben-Petersen, 1909 (syn.)
  • Parameletus columbiae McDunnough, 1938 [CAN:NW;USA:NW]
  • Parameletus croesus (McDunnough, 1923) [CAN:NE]
    • Siphlonuroides croesus McDunnough, 1923 (orig.)
  • Parameletus midas (McDunnough, 1923) [CAN:NE]
    • Siphlonuroides midas McDunnough, 1923 (orig.)
  • Siphlonisca aerodromia Needham, 1909 [CAN:NE;USA:NE]
  • Siphlonurus alternatus (Say, 1824) [CAN:FN,NE,NW;USA:FN,NE]
    • Baetis alternata Say, 1824 (spell.)
    • Baetis alternatus Say, 1824 (orig.)
    • Baetis annulata Walker, 1853 (syn.)
    • Baetis annulatus Walker, 1853 (syn.)
    • Baetis femorata Provancher, 1876 (syn.)
    • Siphlurella alternata (Say, 1824) (comb.)
    • Siphlurella oblita Bengtsson, 1909 (syn.)
    • Siphlurella thomsoni Bengtsson, 1909 (syn.)
    • Siphlurus alternans (Say, 1824) (spell.)
    • Siphlurus alternatus (Say, 1824) (comb.)
    • Siphlurus linnaeanus Eaton, 1871 (syn.)
  • Siphlonurus autumnalis McDunnough, 1931 [CAN:NW;USA:NW]
  • Siphlonurus barbaroides McDunnough, 1929 [CAN:NE;USA:NE]
  • Siphlonurus barbarus McDunnough, 1924 [CAN:NE;USA:NE]
  • Siphlonurus columbianus McDunnough, 1925 [CAN:NW;USA:NW,SW]
  • Siphlonurus decorus Traver, 1932 [USA:SE]
  • Siphlonurus demaryi Kondratieff & Voshell, 1981 [CAN:NE;USA:NE]
  • Siphlonurus luridipennis (Burmeister, 1839) [USA:SE] (recently extinct)
    • Baetis luridipennis Burmeister, 1839 (orig.)
    • Ecdyurus luridipennis (Burmeister, 1839) (comb.)
    • Heptagenia luridipennis (Burmeister, 1839) (comb.)
  • Siphlonurus marginatus Traver, 1932 [USA:NE,SE]
  • Siphlonurus marshalli Traver, 1934 [CAN:NE;USA:NE,SE]
  • Siphlonurus minnoi Provonsha & McCafferty, 1982 [USA:NE,SE]
  • Siphlonurus mirus (Eaton, 1885) [CAN:NE;USA:NE,SE]
    • Siphlurus mirus Eaton, 1885 (orig.)
  • Siphlonurus noveboracana (Lichtenstein, 1796) (dub.) [USA:NE]
    • Baetis noveboracana (Lichtenstein, 1796) (comb.)
    • Ephemera noveboracana Lichtenstein, 1796 (orig.)
  • Siphlonurus occidentalis (Eaton, 1885) [CAN:FN,NW:MEX:FS,SW;USA:FN,NW,SW]
    • Siphlonurus inflatus McDunnough, 1931 (syn.)
    • Siphlurella occidentalis (Eaton, 1885) (comb.)
    • Siphlurus occidentalis Eaton, 1885 (orig.)
  • Siphlonurus phyllis McDunnough, 1923 [CAN:FN,NE,NW;USA:NE,NW]
  • Siphlonurus quebecensis (Provancher, 1878) [CAN:NE;USA:NE,SE]
    • Baetis canadensis Provancher, 1876 (hom.)
    • Siphlurus quebecensis Provancher, 1878 (orig.)
    • Siphlonurus triangularis Clemens, 1915 (syn.)
  • Siphlonurus rapidus McDunnough, 1924 [CAN:NE;USA:NE]
  • Siphlonurus securifer McDunnough, 1926 [CAN:NE;USA:NE]
  • Siphlonurus spectabilis Traver, 1934 [CAN:FN;USA:NW,SW]
    • Siphlonurus maria Mayo, 1939 (syn.)
  • Siphlonurus typicus (Eaton, 1885) [CAN:NE;USA:NE]
    • Siphlonurus berenice McDunnough, 1923 (syn.)
    • Siphlonurus bernice McDunnough, 1923 (syn.spell.)
    • Siphlonurus novangliae McDunnough, 1924 (syn.)
    • Siphlurus typicus Eaton, 1885 (orig.)