Derorhynchus sp.

Tejedor, Marcelo F., Goin, Francisco J., Gelfo, Javier N., López, Guillermo, Bond, Mariano, Carlini, Alfredo A., Scillato-Yané, Gustavo J., Woodburne, Michael O., Chornogubsky, Laura, Aragón, Eugenio, Reguero, Marcelo A., Czaplewski, Nicholas J., Vincon, Sergio, Martin, Gabriel M. & Ciancio, Martín R., 2009, New Early Eocene Mammalian Fauna from Western Patagonia, Argentina, American Museum Novitates 3638, pp. 1-43 : 10

Derorhynchus sp.

Though scarce, two specimens (LIEB- PV 1102, right m4; LIEB-PV 1140 , isolated left talonid) from Laguna Fría can be confidently referred to the genus Derorhynchus , as they share most of the lower molar pattern (see above) with species of this genus .

Family Sternbergiidae McKenna and Bell 1997 Genus Marmosopsis Paula Couto 1962 Marmosopsis sp.

The referred specimens are two right mx (LIEB-PV 1286, and LIEB-PV 1287), both from La Barda. We tentatively assign them to Marmosopsis sp. for the following reasons: laterally compressed lower molars, proportionally long talonids, and slender, though sharp, trigonid cusps.