Un nuevo Dasyproctidae (Rodentia, Caviomorpha) del Mioceno inferior de Patagonia

KRAMARZ, A.

AMEGHINIANA

Asociación Paleontológica Argentina

Lugar: Buenos Aires; Año: 1998 vol. 35 p. 181 - 192

0002-7014

A  new  genus  and  species,   Australoprocta fleaglei,  from  the  Colhuehuapian  Age  (Early  Miocene),  Sarmiento Formation,  is described. Molar morphology shows an incipient sigmoid pattern as in the Santacrucian genus Scleromys. Upper premolars are pentalophodont but without a differentiated hypocone-hypoflexus.  The pattern of the molars and premolars seems to be structurally ancestral to Scleromys but not to Incamys (from Deseadan of Bolivia) nor to Neoreomys (Santacrucian). Patagonian dasyproctids could have arisen from an Australoprocta-like ancestor, separately from Incamys and living dasyproctids.