Hemipsalodon

Hemipsalodon ("half-scissor tooth") is an extinct genus of hyainailourid hyaenodonts from the subfamily Hyainailourinae that lived in North America during the middle to late Eocene.

Description
The skull of Hemipsalodon grandis is 45 cm in length, with a lower jaw length of 34 cm. The most complete skull (O.M.S.I. No. 619), belonged to an old individual. It is powerfully-built, and overall superficially resembles the mesonychid Harpagolestes. The nasal opening is quite large. The canines are greatly enlarged. The anterior portion of the skull is broad anteriorly, but narrows down considerably posteriorly.