Sierra del Tontal Chinchilla Rat
Encyclopedia
The Sierra del Tontal Chinchilla Rat (Abrocoma shistacea) is a species of chinchilla rat
Chinchilla rat
Chinchilla rats or chinchillones are members of the family Abrocomidae. This family has few members compared to most rodent families with only 9 known living species. They resemble Chinchillas in appearance, with a similar soft fur and silvery-grey color, but have a body-structure more like a...

 in the family Abrocomidae. Found only in Argentina, this species was once thought to be part of Abrocoma cinerea. In 2002, Braun and Mares from the University of Oklahoma
University of Oklahoma
The University of Oklahoma is a coeducational public research university located in Norman, Oklahoma. Founded in 1890, it existed in Oklahoma Territory near Indian Territory for 17 years before the two became the state of Oklahoma. the university had 29,931 students enrolled, most located at its...

confirmed it to be a separate species.
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