Abstract

Wyomylus whitei is a new genus and species of stenomyline camel from the Moonstone Formation (late Barstovian–earliest Hemphillian, middle–late Miocene) of central Wyoming. W. whitei, the youngest known species of the Stenomylinae, is a small, gracile camel that is primitive in many of its characters for such a late-appearing representative. Among the diagnostic characters of W. whitei are: extreme reduction of P1–P3; reduction of P4–M1; reduction of p4–m1; small posterior heel on M3; extreme nasal retraction; large and very deep, but unpocketed anterior maxillary fossa; large, very deep and slightly pocketed preorbital fossa; anteromaxillary and preorbital fossae confluent via an elongate depression directly ventral to the premaxilla–maxilla suture; posteriorly placed orbits; small, but well-developed wing-shaped internal pterygoid processes; very narrow dorsal moiety of the supraoccipital; very weak lambdoidal crest that does not overhang the occiput; and partially fused metatarsals III and IV.

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