Back to today’s briefing

Story perspectives

New Mouse Opossum Discovered in Peruvian National Park

9/27/2025

26 4

Summary

Story summary

A new mouse opossum, Marmosa chachapoya, was discovered in Río Abiseo National Park during a 2018 expedition led by Silvia Pavan.
The specimen measures 4 inches long, with reddish-brown fur and distinctive facial markings, found at 8,740 feet.
Only one specimen has been collected; little is known about its biology or distribution, and expedition findings include an undocumented semi-aquatic rodent.

1 of 1

Story summary

A new mouse opossum, Marmosa chachapoya, was discovered in Río Abiseo National Park during a 2018 expedition led by Silvia Pavan.
The specimen measures 4 inches long, with reddish-brown fur and distinctive facial markings, found at 8,740 feet.
Only one specimen has been collected; little is known about its biology or distribution, and expedition findings include an undocumented semi-aquatic rodent.