Parent taxon: Pecora according to A. A. Khan and M. Sarwar 2002
See also Carroll 1988 and Sach and Heizmann 2001
Sister taxa: Antilocapridae, Babameryx, Bovidae, Bugtimeryx, Camelopardalidae, Cervidae, Dremotherium, Giraffidae, Leptomerycidae, Moschidae, Namibiomeryx, Orangemeryx, Prodremotheridae, Propalaeoryx, Sperrgebietomeryx, Walangania
Subtaxa: Amphiprox Boreameryx Heterocemas Lagomerycidae Palaeomerycidae
Ecology: ground dwelling grazer-browser
Distribution:
• Pliocene of Canada (1: Northwest Territories collection), Ukraine (1), United States (1: North Carolina)
• Hemphillian of United States (27: Alabama, California, Colorado, Florida, Indiana, Kansas, Nebraska, Oklahoma, Texas)
• Miocene of Austria (4), Canada (10: Saskatchewan), China (17), the Czech Republic (2), France (27), Germany (17), Greece (3), Hungary (1), Italy (4), Kenya (1), Moldova (2), Pakistan (2), Poland (1), Portugal (7), Romania (1), the Russian Federation (1), Serbia and Montenegro (2), Slovakia (4), Spain (11), Switzerland (4), Thailand (2), Uganda (1), Ukraine (4), United States (210: California, Colorado, Delaware, Florida, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, Oregon, South Dakota, Texas, Virginia, Washington, Wyoming)
• Harrisonian of United States (7: Nebraska, Oregon)
• Oligocene of France (2), Germany (2), Kazakhstan (3), Mongolia (1), Pakistan (1), Switzerland (2), Turkey (1)
• Eocene of Spain (1)
Total: 388 collections including 504 occurrences