Subfamily Ephemerellinae Klapalek 1909 (mayfly)
Insecta - Ephemeroptera - Ephemerellidae
Parent taxon: Ephemerellidae according to A. H. Staniczek et al. 2017
See also Jacobus and McCafferty 2006 and Jacobus and McCafferty 2008
Sister taxon: Timpanoginae
Subtaxa: Ephemerellini
Ecology:
Distribution:
• Eocene of Poland (1 collection), the Russian Federation (1)
Total: 2 collections each including a single occurrence