Class Mammalia Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Suborder Sciurognathi (Tullberg, 1899)
see Suborder Sciuromorpha Brandt, 1855
Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
Genus Protoxerus Forsyth Major, 1893 - African giant squirrels
1 Protoxerus aubinnii Gray, 1873
2 Protoxerus stangeri (Waterhouse, 1843) - giant forest squirrel
3 Subgenus Allosciurus
4 Subgenus Protoxerus (Forsyth Major, 1893)