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 --> ORDER RODENTIA
 --> SUBORDER HYSTRICOMORPHA
 --> INFRAORDER HYSTRICOGNATHI
 --> FAMILY Ctenomyidae
 --> GENUS Ctenomys
				
 SPECIES Ctenomys opimus
 
| Author: | Wagner, 1848. |  | Citation: | Arch. Naturgesch., 1: 75. |  | Common Name: | Highland Tuco-tuco |  | Type Locality: | Bolivia, Oruro Dept., Monte Sajama. |  | Distribution: | NW Argentina, SW Bolivia, S Peru, N Chile between 2,000 and 5,000 m on the high Andean steppe (=Puna). |  | Status: | IUCN – Lower Risk (lc). Common. |  | Comments: | May be conspecific with fulvus; opimus and fulvus cannot be separated on the basis of karyotypes (see Gallardo, 1979 and Cook et al., 1990). Karyotype has 2n=26 and FN=48 (Gallardo, 1991). |  |  |  | 
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