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Bachia pyburni KIZIRIAN & MCDIARMID, 1998

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Higher TaxaGymnophthalmidae (Cercosaurinae), Sauria, Gymnophthalmoidea, Squamata (lizards) 
Subspecies 
Common Names 
SynonymBachia pyburni KIZIRIAN & MCDIARMID 1998: 246
Bachia panoplia — DIXON 1973:45
Bachia panoplia — AYALA 1986:571
Bachia pyburni — DE FREITAS et al. 2011 
DistributionSE Colombia (Rio Negro drainage), Brazil,
S Venezuela

Type locality: Yapima, Vaupes, Colombia Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous 
TypesHolotype: UTA-R 6855, adult female 
CommentDiagnosis. Bachia pyburni is distinguished from other gymnophthalmid lizards (sensu Estes et al., 1988) by its unique combination of phalangeal elements: 0-3-4-4-3 in the manus and 2-3-4- 4-0 in the pes (Table 1). Like other species of Bachia, B. pyburni lacks an external ear opening and has reduced limbs, an elongate body and tail, and moveable eyelids. In contradistinction to other species of Bachia, B. pyburni has long free digits; e.g., all other species of Bachia have three or fewer (4-5 in B. pyburni) scales on the dorsal side of the longest fingers and four or fewer (4-5 in B. pyburni) scales on the dorsal side of the longest toes. In addition, B. pyburni can be distinguished from all species of Bachia, except B. panoplia, by the presence of lanceolate scales on the venter. From B. panoplia, B. pyburni can be further distinguished by a wider interparietal (length three times width versus length five times width), a greater number of supralabials (seven versus six), and the absence (versus presence) of femoral pores in males. Calyptommatus and Nothobachia also have extremely reduced limbs but are nested within the clade that includes species with scincoid scales and immoveable eyelids: i.e., (Tretioscincus(Micrablepharus (Gymnophthalmus (Procellosaurinus (Vanzosaura (Psilophthalmus (Nothobachia, Calyptommatus)(Rodrigues,1991).

Morphology: Because of its limb morphology, Bachia pyburni is particularly relevant to understanding the evolution of limblessness and the phylogeny of Bachia and its close relatives. Bachia pyburni has more phalangeal elements than other species of Bachia, but fewer than closely related (Dixon, 1973; Kizirian, 1994) species in the genera Anotosaura, Heterodactylus, Colobodactylus, and Colobosaura (Table 1 in KIZIRIAN & MCDIARMID 1998).

Distribution: see map in Ribeiro-Júnior et al. 2016: 153 (Fig. 4). 
EtymologyNamed after William F. Pyburn who “has added significantly to our understanding of the amphibians and reptiles of the Vaupes region of southeastern Colombia”. 
References
  • Barrio-Amorós, César L. & Brewer-Carias, Charles 2008. Herpetological results of the 2002 expedition to Sarisari–ama, a tepui in Venezuelan Guayana, with the description of five new species. Zootaxa 1942: 1-68 - get paper here
  • Costa, Henrique Caldeira & Renato Silveira Bérnils 2015. Répteis brasileiros: lista de espécies 2015 Herpetologia Brasileira 4 (3): 75-93
  • FREITAS, JOSEANA LUISA DE; CHRISTINE STRÜSSMANN, MARCOS ANDRÉ DE CARVALHO, RICARDO ALEXANDRE KAWASHITA-RIBEIRO & TAMÍ MOTT 2011. A new species of Bachia Gray, 1845 (Squamata: Gymnophthalmidae) from the Cerrado of Midwestern Brazil. Zootaxa 2737: 61–68 - get paper here
  • Kizirian, David A. and Roy W. McDiarmid 1998. A new species of Bachia (Squamata: Gymnophthalmidae) with plesiomorphic limb morphology. Herpetologica 54 (2): 245-253. - 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
  • Ribeiro-Júnior, Marco A.; Marcélia B. da Silva, and Jucivaldo D. Lima 2016. A New Species of Bachia Gray 1845 (Squamata: Gymnophthalmidae) from the Eastern Guiana Shield Herpetologica Jun 2016, Vol. 72, No. 2: 148-156.
  • RIVAS, GILSON A.; CÉSAR R. MOLINA, GABRIEL N. UGUETO, TITO R. BARROS, CÉSAR L. BAR- RIO-AMORÓS & PHILIPPE J. R. KOK 2012. Reptiles of Venezuela: an updated and commented checklist. Zootaxa 3211: 1–64 - get paper here
  • RODRIGUES, MIGUEL TREFAUT; AGUSTÍN CAMACHO, PEDRO MURILO SALES NUNES, RENATO SOUSA RECODER, MAURO TEIXEIRA JR., PAULA H. VALDUJO, JOSÉ MÁRIO B. <br />GHELLERE, TAMÍ MOTT & CRISTIANO NOGUEIRA 2008. A new species of the lizard genus Bachia (Squamata: Gymnophthalmidae) from the Cerrados of Central Brazil. Zootaxa 1875: 39–50 - get paper here
  • TEIXEIRA JR, MAURO; RENATO SOUSA RECODER, AGUSTÍN CAMACHO, MARCO AURÉLIO DE SENA, CARLOS ARTURO NAVAS & MIGUEL TREFAUT RODRIGUES 2013. A new species of Bachia Gray, 1845 (Squamata: Gymnophthalmidae) from the Eastern Brazilian Cerrado, and data on its ecology, physiology and behavior. Zootaxa 3616 (2): 173–189 - get paper here
 
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