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Gymnophthalmus vanzoi CARVALHO, 1999

IUCN Red List - Gymnophthalmus vanzoi - Data Deficient, DD

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Higher TaxaGymnophthalmidae (Gymnophthalminae), Gymnophthalmini, Sauria, Gymnophthalmoidea, Squamata (lizards)
Subspecies 
Common NamesPortuguese: Briba 
SynonymGymnophthalmus vanzoi CARVALHO 1999
Gymnophthalmus vanzoi — CASTOE et al. 2004
Gymnophthalmus vanzoi — RECODER et al. 2018 
DistributionBrazil (Roraima, Pará), Guyana

Type locality: Fazenda Salvamento, Rio Uraricoera, Roraima (03° 20’ N, 61° 24’ W)  
Reproductionoviparous 
TypesHolotype: MZUSP 92598, male 
DiagnosisDiagnosis: All scales smooth. 13 rows of scales around the body; 32-37 transversal rows of scales, from the interparietal to the posterior margin of the thigs; 21-29 ventral rows, from the interbrachial to the anal flap; 11-17 subdigital lamellae in the 4th toe. Upper lip with a with narrow white stripe. Dorsal ground color dark brown with reddish reflections. Two dorsolateral stripes, clear brown, from the posterior edge of the rostral to the root of the tail. Gular region clear in females, reddish in males. Ventrally with dark marbled. The tail is brownish in males, and reddish in females and juveniles (Carvalho 1999, translation by Daniel Vásquez-Restrepo, pers. comm. 26 March 2021).

Sexual dimorphism: Silva-da-Silva et al. 2020 collected data from 61 males and 79 females and showed that adult females were larger and heavier than males. They also found sexual dimorphism in snout–vent length, length between limbs, head length, head width, head height, hind limb length, tail width, body mass, and coloration. 
Comment 
EtymologyNamed after Paulo Emilio Vanzolini, Brazilian herpetologist. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Carvalho C M de 1999. Uma nova expécie de microteiideo do gênero Gymnophthalmus do estado de Roraima, Brasil (Sauria: Gymnophthalmidae). PAPEIS AVULSOS DE ZOOLOGIA (SAO PAULO) 40 [1997] (10): 161-174
  • Castoe, T.A.; Doan, T.M. & Parkinson, C.L. 2004. Data partitions and complex models in Bayesian analysis: the phylogeny of Gymnophthalmid lizards. Systematic Biology 53 (3): 448-469 - get paper here
  • Cole, Charles J.; Carol R. Townsend, Robert P. Reynolds, Ross D. MacCulloch, and Amy Lathrop 2013. Amphibians and reptiles of Guyana, South America: illustrated keys, annotated species accounts, and a biogeographic synopsis. Proceedings of the Biological Society of Washington 125 (4): 317-578; plates: 580-620 - get paper here
  • GARCÍA-PÉREZ, JUAN E. & WALTER E. SCHARGEL 2017. A new species of Gymnophthalmus (Squamata: Gymnophthalmidae) from sand dunes of the Llanos of Apure, Venezuela. Zootaxa 4318 (3): 576–586 - get paper here
  • Gonzalez R. C. et al. 2020. Lista dos Nomes Populares dos Répteis no Brasil – Primeira Versão. Herpetologia Brasileira. 9(2): 121 – 214
  • RECODER, RENATO SOUSA; FRANCISCO DAL VECHIO, SERGIO MARQUES-SOUZA, MAURO JR. TEIXEIRA, MAIUME SILVA-DA-SILVA, ALFREDO P. SANTOS-JR., SÍRIA RIBEIRO, CESAR BARRIO-AMORÓS, MIGUEL TREFAUT RODRIGUES 2018. Geographic variation and taxonomy of red-tailed Gymnophthalmus (Squamata: Gymnophthalmidae) from Amazonian Savannas. Zootaxa 4497 (1): 061–081 - get paper here
  • RIBEIRO-JÚNIOR, MARCO A. & SILVANA AMARAL 2017. Catalogue of distribution of lizards (Reptilia: Squamata) from the Brazilian Amazonia. IV. Alopoglossidae, Gymnophthalmidae. Zootaxa 4269 (2): 151-196 - get paper here
  • Ribeiro-Júnior, Marco A. & Silvana Amaral 2016. Diversity, distribution, and conservation of lizards (Reptilia: Squamata) in the Brazilian Amazonia. Neotropical Biodiversity, 2:1, 195-421 - get paper here
  • Silva-da-Silva, Maiume; Danilo Augusto Almeida-Santos, Síria Ribeiro, Renato Sousa Recoder, Alfredo P. Santos 2020. Reproductive Biology and Sexual Dimorphism of Gymnophthalmus vanzoi (Squamata, Gymnophthalmidae) in a Population South of the Amazon River, Brazil. South American J. Herp. 15 (1): 30-40 - get paper here
 
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