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Calyptommatus sinebrachiatus RODRIGUES, 1991

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Higher TaxaGymnophthalmidae (Gymnophthalminae), Gymnophthalmini, Sauria, Gymnophthalmoidea, Squamata (lizards)
Subspecies 
Common NamesE: Lesser Microteiid 
SynonymCalyptommatus sinebrachiatus RODRIGUES 1991
Calyptommatus sinebrachiatus — CASTOE et al. 2004
Calyptommatus sinebrachiatus — BARROS et al. 2020 
DistributionBrazil (Bahia: eastern margin of São Francisco River)

Type locality: Brazil: Bahia: Santo Inácio (11°06’ S, 42°44' W)  
Reproductionoviparous 
TypesHolotype: MZUSP 67.117 
Diagnosis 
CommentLimb morphology: extreme reduction of hind limbs, absence of fore limbs.

They also show absence of prefrontals, frontals, supraoculars and frontoparietals, and are thought to be related to the recently described genus Nothobachia.

Type species: Calyptommatus sinebrachiatus RODRIGUES 1991 is the type species of the genus Calyptommatus RODRIGUES 1991.

Abundance: only known from the type locality (Meiri et al. 2017). 
EtymologyNamed after Latin sine, without + L. brachiatus, having branches. (Esteban Lavilla, pers. comm., April 2024)

The genus was named after Greek calypto (καλυπτός), covered + Greek ommatos (ὄμματος), eye. 
References
  • Andrews, R. M., Brandley, M. C. and Greene, V. W. 2013. Developmental sequences of squamate reptiles are taxon specific. Evolution & Development, 15: 326–343. doi: 10.1111/ede.12042 - get paper here
  • Barros, F. C. de, Grizante, M. B., Zampieri, F. A., & Kohlsdorf, T. 2020. Peculiar relationships among morphology, burrowing performance and sand type in two fossorial microteiid lizards. Zoology, 125880 [print 2021] - get paper here
  • 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
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Rodrigues M T 1991. Herpetofauna das dunas interiores do rio Sao Francisco, Bahia, Brasil. 1. Introducao a area e descricao de um novo genero de microteiideos (Calyptommatus) com notas sobre sua ecologia, distribuicao e especiacao (Sauria, Teiidae). Pap. Avul. Zool., Sao Paulo 37(19) 1991: 285-320 - get paper here
  • Rodrigues, M.T. 2003. Herpetofauna da Caatinga. In: I.R. Leal, M. Tabarelli & J.M.C. Silva (eds.). Ecologia e conservação da Caatinga, pp. 181-236. Editora Universitária, Universidade Federal de Pernambuco, Recife, Brasil.
  • Siedchlag, Ana Carolina; Maria Lúcia Benozzati, José Carlos Passoni, Miguel Trefaut Rodrigues 2010. Genetic structure, phylogeny, and biogeography of Brazilian eyelid-less lizards of genera Calyptommatus and Nothobachia (Squamata, Gymnophthalmidae) as inferred from mitochondrial DNA sequences. Molecular Phylogenetics and Evolution 56 (2): 622-630 - get paper here
  • Uchôa LR, Delfim FR, Mesquita DO, Colli GR, Garda AA, Guedes TB 2022. Lizards (Reptilia: Squamata) from the Caatinga, northeastern Brazil: Detailed and updated overview. Vertebrate Zoology 72: 599-659 - get paper here
  • Yonenaga-Yassuda, Yatiyo et al. 2005. Chromosomal banding patterns in the eyelid-less microteiid lizard radiation: The X1X1X2X2:X1X2Y sex chromosome system in Calyptommatus and the karyotypes of Psilophthalmus and Tretioscincus (Squamata, Gymnophthalmidae). Genetics and Molecular Biology 28 (4): 700-709 - get paper here
 
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