Cercosaura bassleri Ruibal, 1952

Type-locality. Perené, Rio Perené, Peru.

Pertinent taxonomic references. Ruibal (1952), Cunha (1961), Peters & Donoso-Barros (1970), Ávila-Pires (1995), Doan (2003), Echevarría et al. (2015), Torres-Carvajal et al. (2015), Goicoechea et al. (2016).

Distribution and habitat. Cercosaura bassleri is endemic to western Amazonia, with its eastern distribution delimited by the Negro River north of the Amazon, and the Madeira river system south of it, occurring in Brazil, Colombia, Peru, and Bolivia (Fig. 8). In Brazil, it is known from the states of Amazonas, Acre, and Rondônia. Cercosaura bassleri is terrestrial and diurnal, inhabits terra firme forest, where it is mainly found among leaf litter (Duellman & Salas 1991; Schlüter et al. 2004; Macedo et al. 2008).