Myotis albescens (É. Geoffroy, 1806)

Cláudio, Vinícius C., Barbosa, Gedimar P., Rocha, Vlamir J. & Rassy, Ricardo Moratelli Fabrício B., 2020, The bat fauna (Mammalia: Chiroptera) of Carlos Botelho State Park, Atlantic Forest of Southeastern Brazil, including new distribution records for the state of São Paulo, Zoologia (e 36514) 37, pp. 1-32 : 24

Myotis albescens (É. Geoffroy, 1806)

Fig. 38

Taxonomy. In Brazil, Myotis Kaup, 1829 is represented by M. albescens (É. Geoffroy, 1806) , M. izecksohni Moratelli et al., 2011 , M. lavali Moratelli et al., 2011 , M. levis (I. Geoffroy, 1824) , M. nigricans (Schinz, 1821) , M. riparius Handley, 1960 , M. ruber (É. Geoffroy, 1806) and M. simus Thomas, 1901 ( Reis et al. 2017). M. simus differ from the congeners by the shorther dorsal fur (<4 mm), and by the wing membranes attached to the tibia or to the feet by a narrow band of membrane (<1.5 mm; at the feet by a larger band of membrane in other species; see Moratelli et al. 2011b, 2013). Myotis albescens and M. levis are externally separated from the Brazilian congeners by the presence of a fringe of hairs along the trailing edge of the uropatagium and frosted ventral fur. Myotis albescens can be distinguished from M. levis by the smaller ear length (9–14 mm in M. albescens and 14–18 mm in M. levis ) and smaller body size (mean length of forearm 34.6–35.8 mm in M. albescens and 36.9 mm in M. levis – Bárquez et al. 1999, Moratelli and Oliveira 2011). The PECB specimen (ZSP 005; see Table 10 for measurements) identified as M. albescens fit the description of this species provided by Moratelli and Oliveira (2011) and Moratelli et al. (2013), as follow: dorsal fur silky, long, and bicolored, with blackish brown basis and mid brown tips (ca. 6 mm between shoulders); venter lighter than the dorsal fur, strongly bicolored, with dark brown basis and white tips; fringe of hairs along the trailing edge of the uropatagium present; wing membranes attached to the feet; and face and ears dark brown.

Distribution. In Brazil, the species is recorded in the Amazon, Atlantic Forest, Caatinga, and Pantanal, occurring in the states of Acre, Amazonas, Amapá, Bahia, Minas Gerais, Mato Grosso do Sul, Pará, Paraná, Rio de Janeiro, Rondônia, Roraima, Rio Grande do Sul, and São Paulo ( Reis et al. 2017). In São Paulo the species is widely distributed ( Garbino 2016).

Field observations. In October, we captured two pregnant females in a building roof, in sampling site S2 (Appendix 1). At the same roost, we captured 13 Histiotus velatus , 17 Molossus molossus and one Myotis ruber .