Fig. 37

Taxonomy. In Brazil, Histiotus Gervais, 1856 is represented by H. alienus Thomas, 1916, H. diaphanopterus Feijó, Rocha & Althoff, 2015, H. laephotis Thomas, 1916, H. montanus (Philippi & Landbeck, 1861), and H. velatus (I. Geoffroy, 1824) (Reis et al. 2017). H. diaphanopterus, which is recorded only in Caatinga and Cerrado, can be easily distinguished by a distinctly bicolored dorsal fur, which is unicolored or weakly bicolored in the congeners and a very high skin band between ears (4 mm in H. diaphanopterus, and <4 mm in the congeners; Feijó et al. 2015). Histiotus velatus is distinguished from the remaining species by a triangular shaped ear, which is oval in the remaining species (Feijó et al. 2015). The PECB specimens (ZSP 004, 046; see Table 10 for measurements) have weakly bicolored dorsal fur with dark brown basis and yellowish-brown tips; bicolored ventral fur, with dark brown basis and grayish-brown tips; and large and triangular ears connected by a narrow band of skin (3 mm).

Distribution. In Brazil, the species occurs in the Atlantic Forest, Cerrado, Pantanal and Pampas biomes, in Mato Grosso, Goiás, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul states (Feijó et al. 2015, Reis et al. 2017). In São Paulo, the species is widely distributed, occurring in all the vegetational formations (Garbino 2016).

Field observations. All the 13 specimens (1 male and 12 females) captured were taken in building roofs in sampling site S2 (Appendix 1). In this site, we also captured 17 M. molossus, two M. albescens and one M. ruber. Captures occurred in May, July and October. Pregnant females were caught in October.