Order Chiroptera - Family Vespertilionidae 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 1 451 529 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Pipistrellus (Pipistrellus) nanulus Thomas 1904 Pipistrellus (Pipistrellus) nanulus Thomas 1904 , Ann. Mag. Nat. Hist., ser. 7, 14: 198 . Type Locality: Cameroon , Efulen. Vernacular Names: Tiny Pipistrelle . Distribution: Sierra Leone and Côte d’Ivoire to Kenya ; Bioko ( Equatorial Guinea ). Conservation: IUCN 2003 and IUCN / SSC Action Plan (2001) – Lower Risk (lc). Discussion: Subgenus Pipistrellus .