Ephemeridae Leach, 1817
Hexagenia albivitta (Walker, 1853)
Hexagenia atrocaudata McDunnough, 1924
Hexagenia bilineata (Say, 1824)
Hexagenia limbata (Serville, 1829)
Hexagenia mexicana Eaton, 1885
Hexagenia orlando Traver, 1931
Hexagenia rigida McDunnough, 1924