|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Rodentia - Cricetidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|C. W. Hibbard 1955||mouse belonging to the subgenus Peromyscus the size of P. leucopus noveboracensis (Fischer). The dental characters are inter- mediate between Peromyscus cragini Hibbard, from the Cudahy fauna of Meade County, Kansas, and the Recent species P . leucopus and P . manicu- latus. Internal and external re-entrant valleys between the cusps are broader in P. cochrani than in P. leucopus and P. maniculatus. Mesostylid, ectostylid, mesostyle, and enterostyle are not as well developed as in Recent species of the subgenus Peromyscus. No lophids are present on the lower teeth, and the mesolophs on the upper molars are either only slightly developed or absent.|