capítulos de libros
The Leontiniidae (Mammalia, Notoungulata) from the Sarmiento Formation at Gran Barranca, Chubut Province, Argentina
A.M. RIBEIRO, G.M. LÓPEZ AND M. BOND
The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic
Cambridge University Press
Lugar: Cambridge,UK; Año: 2010; p. 170 - 181
At Gran Barranca, pyroclastic sediments comprising lithostratigraphic units of the Sarmiento Formation include three fossil-bearing levels in the Upper Puesto Almendra Member (GBV-19, GBV-34 and GBV-35) and four in the Colhue-Huapi Member (GBV 8, GBV-9, GBV-10, GBV-38 and GBV-43). Two new taxa occur at GBV-19, one of these, Scarrittia barranquensis n. sp., also occurs at GBV-34. This new taxon shares with S. canquelensis and S. robusta, enlarged and caniniform incisors I1/i3, but is smaller and premolar morphology is distinct. The second new taxon is Henricofilholia vucetichia n. sp., much smaller than S. barranquensis and lacks labial and lingual cingulids on the premolars and molars. A right dentary fragment from GBV-35 with worn m1-3 is here assigned to cf. S. canquelensis. The unique leontiniid from the Colhue-Huapi Member (type Colhuehuapian) is Colpodon distinctus.