Mygalodelphys
- Sepia Short-tailed Opossum Monodelphis (Mygalodelphys) adusta
The sepia short-tailed opossum is a small marsupial with few records. It is found in forests and is thought to live on the ground.
- Handley's Short-tailed Opossum Monodelphis (Mygalodelphys) handleyi
This short-tailed opossum is known from lowland forest in northeastern Peru. Its short brown back contrasts with a pale cream belly and a lighter stripe that widens near the middle.
- Pygmy Short-tailed Opossum Monodelphis (Mygalodelphys) kunsi
This small opossum has brown fur above and pale fur below. Few specimens are known, and its behavior and preferred habitat remain poorly understood.
- Osgood's Short-tailed Opossum Monodelphis (Mygalodelphys) osgoodi
Osgood's Short-tailed Opossum has been reported from central Peru to central Bolivia. The MDD cautions that specimens beyond genetically confirmed individuals in Bolivia may not all have been correctly identified.
- Peruvian Short-tailed Opossum Monodelphis (Mygalodelphys) peruviana
This small marsupial occurs in Peru and Bolivia. A Matses survey in Peru reports specimens from primary forest and a swidden edge.
- Monodelphis pinocchio Monodelphis (Mygalodelphys) pinocchio
Monodelphis (Mygalodelphys) pinocchio is known from a few Atlantic Forest localities in southeastern Brazil. It has a uniformly brown back, small eyes and ears, and a remarkably long, narrow rostrum.
- Reig's Opossum Monodelphis (Mygalodelphys) reigi
This opossum was described from Sierra de Lema in southeastern Venezuela. The original account describes the surrounding area as evergreen montane forest.
- Pine's Opossum Monodelphis (Mygalodelphys) ronaldi
The 2007 specialist account reported one adult male specimen from Pakitza in southeastern Peru, collected in lowland humid forest.