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Prohesperocyon ("before Hesperocyon") is an extinct genus of dog (family Canidae) named by Xiaoming Wang in 1994. Only a single species, Prohesperocyon wilsoni, is recognized. Prohesperocyon inhabited Texas during the late Eocene, approximately 36 million years ago. Prohesperocyon was first described as a new species of the genus Hesperocyon, but Wang placed it in a new genus because it lacks features of the skull and dentition found in all other canids, including Hesperocyon.[1] More recent studies indicate that Prohesperocyon may not even belong to Canidae.[2] Although Prohesperocyon may be the most basal known canid, Hesperocyon appears in the fossil record before Prohesperocyon.
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