Family Ephemerellidae Klapalek 1909 (mayfly)
Insecta - Ephemeroptera - Ephemerellidae
Parent taxon: Ephemerelloidea according to T. H. Ogden et al. 2009
See also Carpenter 1992, Hong 1984, Jacobus and McCafferty 2006, Kluge 2004 and McCafferty and Edmunds 1979
Sister taxa: Leptohyphidae, Philolimniidae, Teloganellidae, Teloganodidae, Vietnamellidae
Subtaxa: Ephemerellinae Timpanoginae
Ecology:
Distribution:
• Eocene of Poland (1 collection), the Russian Federation (2)
Total: 3 collections each including a single occurrence