Merycoidodontoidea, previously known as "oreodonts" or "ruminating hogs,"[citation needed] are an extinct superfamily of prehistoric cud-chewing artiodactyls...

Superfamily Cameloidea Family †Oromerycidae Family Camelidae Superfamily †Merycoidodontoidea (=Oreodontoidea) Family †"Agriochoeridae" (paraphyletic) Family †Merycoidodontidae...

more elongated and slender limbs than those of others within the Merycoidodontoidea. The front legs were five-toed, with an atrophied thumb, while the...

tooth measurements of the kind typically used in the systematics of Merycoidodontoidea can diagnose between related, similarly sized even-toed ungulates...