The Suoidea (Mammalia, Artiodactyla), exclusive of Listriodontinae, from the early Miocene of Béon 1 (Montréal-du-Gers, Sw France, MN4)

The French locality of Béon 1, located in the district of Montréal-du-Gers (Gers, France), has yielded a rich collection of suoids, including dental, cranial, and postcranial remains. The small suoids from Béon 1 (i.e. Listriodontinae excepted) are revised in this article. Hyotherium lacaillei n. sp. is named and Chicochoerus n. gen. is described for a very small species of Suidae previously known as “Aureliachoerus” minus (Golpe Posse, 1972) from the Spanish localities of Can Canals and El Canyet and from Austria (Styria); some specimens of a member of the Palaeochoeridae, Taucanamo grandaevum (Fraas, 1870), are also described. Based on the literature and on new observations, a phylogenetic analysis including 44 dental, cranial, and postcranial characters, proposes a sketch of the relationships of 23 early and middle Miocene European suoids. In the strict consensus of the 240 shortest trees, Suidae and Palaeochoeridae are sister groups. Palaeochoeridae are arranged as [European Taucanamo, Palaeochoeriinae] and Suidae as [Eurolistriodon [Albanohyus, Hyotheriinae]] where Hyotheriinae group is as [Chicochoerus n. gen. [Hyotherium, Aureliachoerus aurelianensis, Xenohyus]].