INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
Taxonomic reinterpretaton of a Notoungulata Typotheria from the early Oligocene of Cañadón Blanco (Chubut, Argentina)
CERDEÑO, E; REGUERO, M.A.; VERA, B.
ASOCIACION PALEONTOLOGICA ARGENTINA
Lugar: Buenos Aires; Año: 2010 vol. 47 p. 401 - 401
The specimen presented in this work is a very interesting incomplete mandible of a notoungulate presenting a set of characters that a priori could indicate different families of Typotheria, which is why it deserves a particular study. Reguero (1999: 203) originally considered it to represent a new taxon of the Family Hegetotheriidae, but a different taxonomic interpretation is presented in this paper. The studied specimen, MLP 12-1530, is stored at the Museo de La Plata (MLP). It is an incomplete mandible with the symphysis and the anterior portions of both horizontal rami. It comes from the Cañadón Blanco locality, in Chubut Province, a classical Paleogene site in Patagonia with mammals mainly collected by Dr. S. Roth. Concerning age, Cañadón Blanco seems to correspond to the Astraponotéen plus supérieur of Ameghino from Gran Barranca, which is currently correlated to the Tinguirirican age (Reguero, 1999; Reguero et al. 2003).