Ephemera compar

{{Short description|Species of mayfly}}

{{Speciesbox

| genus = Ephemera

| species = compar

| authority = Hagen, 1875

}}

Most likely, Ephemera compar is an extinct species of burrowing mayfly in the family Ephemeridae. It was found in North America.

Ephemera compar is known from a single specimen, collected from the "foothills of Colorado" in 1873, but despite intensive surveys of the Colorado mayflies reported in 1984, it has not been rediscovered.{{Cite journal |title="Ephemera compar: an obscure Colorado burrowing mayfly (Ephemeroptera: Ephemeridae" |url=http://www.ephemeroptera-galactica.com/pubs/pub_e/pubedmundsg1984p186.pdf |journal=Entomological News |issue=95 |pages=186-188}}