Ticholeptus is an extinct genus of oreodont endemic to North America during the Middle Miocene epochs (16.0—13.6 mya), existing for approximately. Fossils have been uncovered throughout the U.S. from Florida to Oregon, as well as California, and numerous sites in Nebraska, Nevada, and Montana.
Merycoidodontoidea, sometimes called "oreodonts" or "ruminating hogs", is an extinct superfamily of prehistoric cud-chewing artiodactyls with short faces and fang-like canine teeth. As their name implies, some of the better known forms were generally hog-like, and the group has traditionally been placed within the Suina, though some recent work suggests they may have been more closely related to camels. "Oreodont" means "mountain teeth", referring to the appearance of the molars. Most oreodonts were sheep-sized, though some genera grew to the size of cattle. They were heavy-bodied, with short four-toed hooves and comparatively long tails.
Oreonetes is an extinct genus of oreodont endemic to North America from the Late Eocene 38.0—33.9 Ma living approximately.