Heteromeryx is an extinct genus of Artiodactyla, of the family Protoceratidae, endemic to North America from the Eocene epoch (Duchesnean to Chadronian stage) 40.2—33.9 Ma, existing for approximately 6.3 million years.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0