Hyperacrius Miller, 1896 . N. Am. Fauna, 12:54.

COMMENT: Reviewed by Phillips, 1969, J. Mammal., 50:457-474. Placed in tribe Clethrionomyini by Gromov and Polyakov, 1977:136. Closely related to Alticola, Eothenomys and Dinaromys (JC) . Closely related to Prometheomys (WVK) . Related either to Prometheomys or to Lagurus (CAR).

ISIS NUMBER: 5301410008077000000.