Oxyaenidae

Oxyaenidae is a family of the extinct order Creodonta; it contains three subfamilies comprising ten genera. The placement of a fourth subfamily, Machaeroidinae, is unsure; it may belong here or in Hyaenodontidae. North American oxyaenids were the first creodonts to appear during the late Paleocene, while smaller radiations of oxyaenids in Europe a...
Found on http://en.wikipedia.org/wiki/Oxyaenidae

Oxyaenidae

(from the article `Creodonta`) ...and primitive, and the skull was relatively long and low. Prominent crests present on the skull served for the attachment of well-developed ...
Found on http://www.britannica.com/eb/a-z/o/43
No exact match found