Genus: Incadelphys MARSHALL & MUIZON, 1988
Etymology: In reference to the Inca Civilization and Greek, delphys, "opossium": Inca opossum.

Species: antiquus MARSHALL & MUIZON, 1988
Etymology: Latin, antiqua, "ancient."

Holotype: YPFB Pal 6251

Locality: Tiupampa, Bolivia.

Horizon: Mammal-bearing level of the El Molino Formation.


Age: Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: A left maxillary with base of UP1, UP2-UM4 present (UM4 erupting and missing tip of protocone, unerupted UP3, a right maxillary fragment with UM1-4 (UM4 erupting) and unerupted UP3, a right mandibular ramus with LP1-LM3, talonid of LM4, unerupted LP3 and LM5, a left mandibular ramus with talonid of LM1, LM2-3 complete LM5 unerupted.