Order Chiroptera - Family Phyllostomidae 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 1 395 426 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Tonatia bidens (Spix 1823) [Vampyrus] bidens Spix 1823 , Sim. Vespert. Brasil .: 65 . Type Locality: Brazil , Bahia , Rio Sao Francisco. Vernacular Names: Greater Round-eared Bat . Synonyms: Tonatia childreni Gray 1838 . Distribution: NE Brazil to N Argentina and Paraguay . Conservation: IUCN 2003 and IUCN / SSC Action Plan (2001) – Lower Risk (lc). Discussion: Most material previously referred to bidens from Central America and northern South America is now recognized as saurophila ; see Williams et al. (1995).