Genus: Pucadelphys MARSHALL & MUIZON, 1988
Etymology: In reference to the Puca (Quenchua “red”) Group, El Molino Formation, Late Cretaceous, Tiupampa, Bolivia and Greek, delphys, "womb" a common term for opossum: Puca (Group) opossum.

Species: andinus MARSHALL & MUIZON, 1988
Etymology:

Holotype: YPFB Pal 6105

Locality: Tiupampa, Bolivia.

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

Biostratigraphy:

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

Material: A nearly complete skull with alveoli of UI3-5, and UL1 and UC-UM5 present on right side, alveoli of UI1 and UI1-5, and UI2, UC, posterior half of UP3 and UM2-5 on left side, right mandibular ramus with LI2-3, LC-M5 present, and alveoli of LI1 and LI4, posterior half of left mandibular ramus with LM2-5, associated and articulated partial skeleton of neck and thoracic regions.

Hypodigm:

MNHN Vil 118: A partial isolated left LM3.

MNHN Vil 127: A partial isolated left LM5.

YPFB Pal 6106: Nearly complete articulated skeleton without skull.

YPFB Pal 6107: Greater part of skull, articulated mandibles and most of dentition.

YPFB Pal 6108: Greater part of partially crushed skull with articulated mandibles and most of dentition.

YPFB Pal 6109: Rostral part of skull with right UC-UP3, left UP1-UM5, greater part of left mandible with bases of LC and LP1, and LP2-LM5.

YPFB Pal 6110: Greater part of skull with articulated mandibles and parts of articulated thoracic region of skeleton.

YPFB Pal 6111: Partial articulated skeleton from thoracic region to below base of tail.