[1] The species is known only from the Middle Eocene Parachute Member, part of the Green River Formation, in the Piceance Creek Basin, Garfield County, northwestern Colorado, USA.

The fossil was recovered by David Kohls of Colorado Mountain College and A. P. Rasnitsyn of the Russian Academy of Sciences from outcrops of the Green River Formations Parachute Member exposed in the Anvil Points area of Garfield County, Colorado, USA.

[1] The type specimen is currently preserved in the paleoentomology collections housed in the Paleontological Institute, Russian Academy of Sciences, located in Moscow, Russia.

[1] The generic name was coined by Shcherbakov in recognition of the world authority in planthoppers, A. F. Emeljanov, with the tribe name being a derivative of the genus name.

The E. alexandri type specimen is a well-preserved almost complete adult fore-wing, called a tegmen which is 12 millimetres (0.47 in) long.