Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Protoceratidae
Genus: Poabromylus
Peterson, 1931
Referred species
  • Poabromylus golzi (Black, 1978)
  • Poabromylus kayi (Peterson, 1931)
  • Poabromylus proavus (Stock, 1949)

Poabromylus is a small extinct genus of protoceratid endemic to North America from the Eocene epoch (Uintan to Chadronian stage) 46.2—33.9 Ma, existing for approximately 12.3 million years.


Poabromylus was named by Peterson (1931). Its type is Poabromylus kayi. It was assigned to Protoceratidae by Peterson (1931), Carroll (1988), Prothero (1998) and Prothero and Ludtke (2007).


Poabromylus resembled deer. However they were more closely related to camelids. In addition to having horns in the more usual place, protoceratids had additional, rostral horns above the orbital cavity.

Body mass[]

Three fossil specimens of Poabromylus were measured by M. Mendoza, C. M. Janis, and P. Palmqvist for body mass.[6] The specimens were determined to weigh:

  • Specimen 1: 19.6 kg (43 lb)
  • Specimen 2: 25.9 kg (57 lb)
  • Specimen 3: 12.8 kg (28 lb)