Argentine fat-tailed mouse opossum
Encyclopedia
The Argentine fat-tailed mouse opossum (Thylamys sponsorius) is a species of opossum in the family Didelphidae. It is found in the eastern foothills of the Andes
in northern Argentina
and southern Bolivia
. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based except for the white to yellowish chest hairs. It is distinguished from Thylamys cinderella
by its postorbital ridges. Thylamys cinderella
has well-developed postorbital ridges in both juveniles and adults that extend laterally behind the eye sockets. Only adults of Thylamys sponsorius have fully developed postorbital ridges, and these do not extend laterally behind the eye sockets.
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 northern Argentina
Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...
and southern 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...
. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based except for the white to yellowish chest hairs. It is distinguished from Thylamys cinderella
Cinderella fat-tailed mouse opossum
The Cinderella fat-tailed mouse opossum is a species of opossum in the family Didelphidae. It is found in northern Argentina and southern Bolivia, in the eastern foothills of the Andes. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based, except for the white to yellowish...
by its postorbital ridges. Thylamys cinderella
Cinderella fat-tailed mouse opossum
The Cinderella fat-tailed mouse opossum is a species of opossum in the family Didelphidae. It is found in northern Argentina and southern Bolivia, in the eastern foothills of the Andes. Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based, except for the white to yellowish...
has well-developed postorbital ridges in both juveniles and adults that extend laterally behind the eye sockets. Only adults of Thylamys sponsorius have fully developed postorbital ridges, and these do not extend laterally behind the eye sockets.