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Temporal range: Pliocene - Recent
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Nesomyidae
Subfamily: Petromyscinae
Roberts, 1951
Genus: Petromyscus
Thomas, 1926

Petromyscus barbouri
Petromyscus collinus
Petromyscus monticularis
Petromyscus shortridgei

Petromyscus is a genus of rodent in the family Nesomyidae. 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. They are found in southwestern Africa. 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.

The genus contains the following species: