The Quechuan mouse opossum, Marmosa quichua, is a South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

n opossum species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of the famiy Didelphidae. It is known from two areas of montane forest on the eastern slopes of the Andes

Andes

The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

 in Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

, at altitudes from 300 to 2700 m. The type locality in the Valle de Occobamba is in the southern area, in Cuzco Region, while the northern area is in the vicinity of Moyobamba

Moyobamba

Moyobamba is the capital city of the San Martín Region in northern Peru. Called "Santiago of eight valleys of Moyobamba" or "Maynas capital". There are 70,000 inhabitants, according to the 2009 census. Some 3,500 species of orchids are native to the area, which has led to the city's nickname of...

 in San Martín Region

San Martín Region

San Martín is a region in northern Peru. Most of the region is located in the upper part of the Peruvian Amazon rainforest. Its capital is Moyobamba and the largest city in the region is Tarapoto.-Boundaries:* North and East: Loreto Region...

. The true range may be more extensive and possibly extends into Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

. The northern area has suffered from habitat destruction

Habitat destruction

Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity mainly for the purpose of...

, but the southern area is not seriously degraded.