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 Funisciurus isabella subsp. isabella Gray 1862 Funisciurus isabella subsp. isabella Gray 1862 , Proc. Zool. Soc. Lond., 1862: 180 . Type Locality: Cameroon , "...from the Camaroon Mountains, 7000 feet ( 2100 m ) above the level of the sea..." . Synonyms: Funisciurus isabella subsp. duchaillui Sanborn 1953 .