Diagnosis- A large species of caenolestid marsupial with the following distinguishing traits: canines large and massive; nasals long and exceeding half of greatest length of skull; p2 large with its anterior cusp elevated; crown of p3 enlarged; posterior margin of palate squared; anterior palatal foramen opens far anteriorly, between p1 and p2; posterior palatal foramen opens level with anterior margins of p3; antorbital vacuity is bordered by premaxilla, nasal, and frontal bones; gaps between anterior maxillary teeth, particularly I3-I4 and C-P13 larger, in some cases exceeding the lengths of anterior teeth; I4 in contact with the anterior margin of C; color of dorsal pelage fuscous, browner below, and coarse-textured; sides of rhinarium and mystacial vibrissae whitish.