Petromyscus
It is so distinct from other rodents that it is placed as the only genus in subfamily Petromyscinae.In previous classifications, Delanymys brooksi has also been placed in the subfamily.These animals have a sharp lower point to their V-shaped infraorbital canal.Their molars are intermediate between the ancestral cricetid style tooth and the dendromurine style tooth.This Muroid rodent article is a stub.