Heteromeryx is an extinct genus of artiodactyl, of the family Protoceratidae, endemic to North America. They lived during the Late Eocene 37.2—33.9 Ma, existing for approximately .[1] They resembled deer, but were more closely related to camelids.
Its name comes from hetero (ἕτερος) "different' and meryx "ruminant"
Fossils have been recovered from: