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Atractus spinalis PASSOS, TEXEIRA Jr, RECODER, DE SENA, DAL VECHIO, DE ARRUDA PINTO, MENDONÇA, CASSIMIRO & RODRIGUES, 2013

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymAtractus spinalis PASSOS, TEXEIRA Jr, RECODER, DE SENA, DAL VECHIO, DE ARRUDA PINTO, MENDONÇA, CASSIMIRO & RODRIGUES 2013 
DistributionSE Brazil (Minas Gerais)

Type locality: Alto do Palácio (19°15’35.5”S, 43°31’55.2”W; 1357 m elevation), Parque Nacional da Serra do Cipó, municipality of Morro do Pilar, state of Minas Gerais, Southeastern Brazil. 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.
 
Reproduction 
TypesHolotype: MZUSP 20760, adult male, collected by M.T. Rodrigues and collaborators (all authors except the senior one) on March 26, 2011 (field number MTR 20280). 
CommentDiagnosis: Atractus spinalis is distinguished from all congeners by the following combination of characters: (1) 15-15-15 smooth dorsal scale rows; (2) two postoculars; (3) moderate loreal; (4) temporals 1+2; (5) seven supralabials, third and fourth contacting orbit; (6) seven infralabials, first four contacting chin shields; (7) usually nine maxillary teeth; (8) usually three gular scale rows; (9) three or four preventrals; (10) 149 ventrals in the single female, 136-142 in males; (11) 24 subcaudals in the female, 27-33 in males; (12) dorsum red, except for first dorsal scale rows that is red on its upper area, becoming lighter towards venter, occasionally forming conspicuous dorsolateral lines along body; (13) ventral ground color creamish white; (14) small body size, females (199 mm SVL) and males (268 mm maximum SVL); (15) moderate tail in the female (11.6%) and moderate to long in males (13.6-16.6% SVL); (16) hemipenis slightly bilobed, semicapitate, and semicalyculate. 
EtymologyThe specific epithet “spinalis” is a Latin adjective derived from Spina, meaning the vertebrate backbone. The use of spina referring to backbone dates back to the Roman poet Virgil (70-19 before Christ). This name is herein used in reference to the Espinhaço Mountains Range (= Cadeia do Espinhaço), where the type series of Atractus spinalis was collected and the species appears to be endemic. 
References
  • Passos, Paulo; TeixeirA Junior, Mauro; Recoder, Renato S.; Sena, Marco Aurélio de; Vechio, Francisco Dal; Pinto, Hugo Bonfim de A.; Mendonça, Sônia H.S.T.; Cassimiro, José; Rodrigues, Miguel Trefaut 2013. A new species of Atractus (Serpentes: Dipsadidae) from Serra do Cipó, Espinhaço Range, Southeastern Brazil, with proposition of a new species group to the genus. Pap. Avulsos Zool. (São Paulo) 53 (6):75‐85 - get paper here
 
External links  
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http://reptile-database.reptarium.cz/species?genus=Atractus&species=spinalis

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