ARTIODACTYLS FROM THE MIDDLE EOCENE OF KHAICHIN-ULA II, MONGOLIA

Abstract

The Middle Eocene fauna of the Khaichin-Ula II locality is shown to include four artiodactyl species assigned to three genera of three families of the suborder Suiformes: Helohyidae, Dichobunidae, and Raoellidae. Three species are new: Gobiohyus reshetovi, Chorlakkia valerii, and Haqueina sp. The genus Gobiohyus is also represented by the species G. pressidens Matthew et Granger. In its artiodactyl composition, the Mongolian fauna is similar to the Middle Eocene faunas of China and Pakistan. Representatives of the families Helohyidae and Dichobunidae are described.