Merycoidodon - Taxonomy

Taxonomy

Merycoidodon was named by Leidy (1848). Its type is Merycoidodon culbertsoni. It was considered a nomen nudum by Cope (1884); it was considered a nomen dubium by Sinclair (1924); it was considered a nomen vanum by Lander (1998). It was assigned to Merycoidodontidae by Joseph Leidy (1848), Thorpe (1937), Scott (1940), Galbreath (1953), Toohey (1959) and Stevens and Stevens (1996).

Most researchers in paleobiology and paleontology, however, now use the antecedent genus Merycoidodon to refer to this Oligocene epoch oreodont. The name "Oreodon" is actually a synonym of the fish genus Orodus, and is, thus, not a valid scientific name.

Taxonomically speaking, Merycoidodon (a.k.a. Oreodon) belongs to the family "Merycoidodontidae" (once known as "Oreodontidae"), a group of artiodactyls related to camels that were endemic to North America. Its ancestors date back to the Eocene and its last descendants are known from the Pliocene, so that oreodonts, broadly speaking, lived throughout the whole of the Tertiary era.