 The juvenile form resembles a juvenile drumfish, with the dorsal fin forming a long crest on top of the head.The earlier species, "E. proxima", is known from the Danata Formation Lagerstätten from the Late Paleocene of Turkmenistan.The latter-occurring species, "E. velifer", is the better studied species, and is known from numerous adult and juvenile specimens from the Middle Eocene Monte Bolca Lagerstätten.