Field of Science

Osteology of the Middle Triassic Traversodontid Andescynodon


Liu, J., and J. Powell. 2009. Osteology of Andescynodon (Cynodontia:Traversodontidae) from the Middle Triassic of Argentina. American Museum Novitates 3674:1-19.

Abstract - All available specimens of Andescynodon mendozensis and Rusconiodon mignonei are examined and restudied, and the latter species is regarded as a junior synonym of the former. The postcranial skeleton of this species is described for the first time; it generally shows primitive features of traversodontids. Andescynodon mendozensis is a small- to medium-sized traversodontid characterized by 9~11 upper postcanines in adults (fewer in larger individuals), the transverse ridge of upper postcanines lying anteriorly on the tooth, paracanine fossa penetrating the skull roof in adult; it is differentiated from Pascualgnathus by relatively flatten skull, shorter and narrower temporal region, presence of four rather than three upper incisors.

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