Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. IV. Alopoglossidae, Gymnophthalmidae Author Ribeiro-Júnior, Marco A. Author Amaral, Silvana text Zootaxa 2017 4269 2 151 196 journal article 33001 10.11646/zootaxa.4269.2.1 24db334d-8e18-4158-a02b-84e08c9fefd3 1175-5326 581975 DDD8F72E-C27A-4B0F-82EA-17B01B93ED9C Gymnophthalmus vanzoi Carvalho, 1997 Type-locality. Fazenda Salvamento, Rio Uraricoera , Roraima , Brazil . Pertinent taxonomic references. Cunha (1981; identified as Gymnophtalmus underwoodi ), Carvalho (1997), Pellegrino et al. (2001), Benozzati & Rodrigues (2003), Castoe et al. (2004), Goicoechea et al . (2016). Distribution and habitat. Gymnophthalmus vanzoi is endemic to northern Amazonia , typical of the Lavrado area of the Guiana region, occurring in Brazil ( Fig. 11 ) and Guyana (Cole et al. 2013). In Brazil , it is only known from the Roraima state. Gymnophthalmus vanzoi is sexually dimorphic, terrestrial, and diurnal, inhabits open vegetation areas (savannas), where it is found among leaf litter and on open sandy soil (Carvalho 1997).