Mammalia - Rodentia - Cricetidae

Alternative combination: Tregomys shotwelli

Full reference: R. L. Wilson. 1968. Systematics and faunal analysis of a Lower Pliocene vertebrate assemblage from Trego County, Kansas. Contributions from the Museum of Paleontology, University of Michigan 22(7):75-126

Belongs to Copemys according to E. H. Lindsay 1972

Sister taxa: Copemys barstowensis, Copemys esmeraldensis, Copemys lindsayi, Copemys longidens, Copemys loxodon, Copemys mariae, Copemys pagei, Copemys pisinnus, Copemys russelli, Copemys tenuis

Type specimen: UMMP V55787, a mandible (sin. with complete dentition). Its type locality is WaKeeny (UM-K6-59), which is in a Clarendonian channel sandstone/claystone in the Ogallala Formation of Kansas.

Average measurements (in mm): m1 1.25 x 0.84

Estimated body mass: 8.6 g based on m1 length