Insecta - Ephemerida - Ephemeridae

Full reference: S. H. Scudder. 1890. The Tertiary Insects of North America. Report of the United States Geological Survey of the Territories XIII:1-734

Belongs to Ephemera according to S. H. Scudder 1890

Sister taxa: Ephemera howarthi, Ephemera immobilis, Ephemera interempta, Ephemera macilenta, Ephemera pumicosa, Ephemera tabifica

Type specimen: 5587, a nymph (very badly preserved). Its type locality is Florissant (MCZ Collection), which is in a Chadronian lacustrine - large shale in the Florissant Formation of Colorado.

Ecology:

Average measurements (in mm): body 9.00 x 2.00, setae length 7.00, wing length 8.00