Full reference: G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25
Sister taxa: none
Type specimen: Amer. Mus. No. 28542, a maxilla (part of left maxilla with P2-M1 and roots of P1). Its type locality is Canadon Hondo (Rio Chican mammals), which is in a Riochican terrestrial horizon in the Rio Chico Formation of Argentina.
Ecology: scansorial herbivore