Class [Mammalia] Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
Subfamily Dendromurinae Allen, 1939 - African climbing mice
Genus Petromyscus Thomas, 1926 - rock mice
Petromyscus collinus Thomas & Hinton, 1925 - pygmy rock mouse