The type species,
E. aegyptiacum, is known from the
Lutetian Mokattam Formation of
Cairo, Egypt. Another species,
E. lambondrano, was recently named on the basis of material found from
Middle Eocene nearshore marine deposits in the
Mahajanga Basin of Madagascar. The species was named after the
Malagasy word for dugong, which translates as "water bushpig". It is known from a nearly complete skull and fragments of pachyosteosclerotic (thick) ribs. Based on its age and morphology,
E. lambondrano may be ancestral to
E. aegyptiacum. Described in 2009,
E. lambondrano is the first pre-
Pleistocene Cenozoic mammal named from Madagascar, being known from an 80-million-year gap in the island's fossil record. Several other species have been named, including
E. babiae from India,
E. majus,
E. clavigerum and
E. sandersi from Egypt, and
E. waghapadarensis, also from India.
E. majus was based on a single upper molar, which was never catalogued and is now lost; ==Paleobiology==