Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. IV. Alopoglossidae, Gymnophthalmidae Ribeiro-Júnior, Marco A. Amaral, Silvana Zootaxa 2017 4269 2 151 196 8GPYY Muller, 1923 Muller 1923 [151,641,152,178] Squamata Gymnophthalmidae Loxopholis CoL Animalia 22 173 Chordata species percarinatum   Pertinent taxonomic references.Müller (1923), Noble (1923), Mertens (1925), Ruibal (1952), Cunha(1961), Uzzell & Barry (1971), Hoogmoed (1973), Ávila-Pires (1995), Pellegrino et al.(2001, 2003, 2011), Rodrigues & Ávila-Pires (2005), Castoe et al.(2004), Laguna et al.(2010), Rodrigues et al. (2013), Souza et al. (2015), Goicoechea et al. (2016).  Taxonomic remarks.This is an unisexual lizard, of which both diploid and triploid populations are known, representing at least two independent lineages (Pellegrino et al.2011). Recently, Souza et al. (2015) reported and described the first known males attributed to the species from two localities in northwestern Amazonia. The same authors did not find morphological differences between unisexual and the specimens from that localities, and suggested that the origin of parthenogenesis in  L. percarinatumprobably occurred on northern Amazonianear the area where the sexually dimorphic populations were found.   Distribution and habitat.  Loxopholis percarinatumis endemic to, and widespread in, Amazonia, occurring in Brazil, Suriname, Guyana, Venezuela, and Peru( Fig. 14). Aguayo & Muñoz (2008) also reported it from Bolivia. In Brazil, it is known from the states of Amapá, Pará, Maranhão, Tocantins, Amazonas, Roraima, Rondônia, and Mato Grosso.  Loxopholis percarinatumis terrestrial and diurnal, inhabits primary and secondary terra firme and flooded (varzea) forests, and swampy areas, where it is found among leaf litter (Vitt et al.1999; Molina et al.2004; Barrio-Amorós et al. 2011; Waldez et al.2013). Even though it occurs in a variety of environments, it is frequently found along shaded water edges ( Cunha1961; Hoogmoed 1973; Martins 1991b; Ávila-Pires 1995; Vitt & Zani 1998; Vitt et al.2008). 1503410418 [151,673,222,247] Brazil Para 22 173 1 Para