Order Rodentia - Family Sciuridae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 754 818 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Protoxerus (Protoxerus) stangeri subsp. stangeri Waterhouse 1842 Protoxerus (Protoxerus) stangeri subsp. stangeri Waterhouse 1842 , Ann. Mag. Nat. Hist., ser. 1, 10: 202 (footnote) . Type Locality: Equatorial Guinea , Bioko. "...brought from Fernando Po ...". Synonyms: Protoxerus (Protoxerus) stangeri subsp. nordhoffi (Du Chaillu 1860) ; Protoxerus (Protoxerus) stangeri subsp. subalbidus (Du Chaillu 1860) .