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Surameryx
''Surameryx'' is an extinct genus of herbivorous even-toed ungulates belonging to the extinct family Palaeomerycidae. A single species, ''S. acrensis,'' is known from the Late Miocene (between the Tortonian to Messinian, between 11.6 to 5.3 million years ago) of South America. It is one of the few northern mammals that entered South America before the Pliocene.〔Donald R. Prothero , Kenneth E. Campbell, Jr. , Brian L. Beatty , and Carl D. Frailey. 2014. (New late Miocene dromomerycine artiodactyl from the Amazon Basin: implications for interchange dynamics ). ''Journal of Paleontology'', 88(3):434-443.〕
== Description ==
''Surameryx'' is known from the left half of the nearly complete lower jaw, reminiscent of the North American palaeomerycids, which are known from numerous fossils.〔
The jaw of ''Surameryx'' is similar to the genus ''Barbouromeryx'' by having a premolar row without reduction compared with the molar row; additionally it showed the characteristic "''Palaeomeryx fold", a typical molar crest present in various types of primitive ruminants, and a vertical groove on the back or inner surface of the fourth premolar. ''Surameryx'', still differ from its relatives in the shape of the molars and premolars, much wider, and a shorter, upward recurved coronoid process; the stylids were also higher than in other similar genres.〔
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