Class [Mammalia] Linnaeus, 1758 - mammals
Order Rodentia Bowdich, 1821 - rodents
Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
Genus Prosciurillus Ellerman, 1947 - Sulawesi dwarf squirrels
1 Prosciurillus abstrusus Moore, 1958
2 Prosciurillus leucomus Müller & Schlegel, 1844
3 Prosciurillus murinus Müller & Schlegel, 1844