Along with Pucadelphys and Mayulestes, it is the oldest known South American metatherian.[2] It is known best from five almost complete skulls, and associated skeletons, all from Tiupampa in Bolivia.[1] It is most similar to Pucadelphys and a clade of Pucadelphydae containing the two genera has been suggested. It was likely a gregarious animal, and a finding of six articulated and intertmingled skeletons has been used as evidence of social behavior being present in basal metatherians.[3]
^Ladeveze, Sandrine; de Muizon, Christian; Beck, Robin M. D; Germain, Damien; Cespedes-Paz, Ricardo (2 June 2011). ""Earliest evidence of mammalian social behaviour in the basal Tertiary of Bolivia". Nature. 474 (7349): 83–86. doi:10.1038/nature09987.