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Atractus thalesdelemai PASSOS, FERNANDES & ZANELLA, 2005

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesPortuguese: Cobra-da-Terra-do-Sul, Cobrinha-da-Terra 
SynonymAtractus thalesdelemai PASSOS, FERNANDES & ZANELLA 2005
Atractus thalesdelemai — PASSOS et al. 2007
Atractus kangueryensis CACCIALI, VILLALBA & YANOSKY 2007
Atractus thalesdelemai — WALLACH et al. 2014: 81
Atractus thalesdelemai — NOGUEIRA et al. 2019 
DistributionS Brazil (Rio Grande do Sul)

Type locality: Fazenda da Brigadda Militar, Municipality of Passo Fundo, Rio Grande do Sul, Brazil (28°14’30”S, 52°21’27”W).

kangueryensis: Paraguay (Itapúa); Type locality: Kangüery, privately-owned reserve by Guyra Paraguay within the area delimited for the implantation of the San Rafael National Park, district of Alto Vera, Itapúa Department (26°30’42”S, 55°47’20”W).  
TypesHolotype: MNRJ 10052
Holotype: MNHNP 11117, female; paratypes: MNHNP; Collected on 23 March 2006 by Ramón Villalba [kangueryensis] 
DiagnosisDescription: Atractus thalesdelemai can be distinguished from all congeners by the combination of a single postocular, long loreal, six supralabials, generally six infralabials, 17 dorsal scale rows, six or seven maxillary teeth, and a dorsal color pattern in preservative uniformly grayish-brown with a creamish-white temporal region.

Diagnosis: Atractus thalesdelemai is distinguished from all congeners by the combination of the following characters: (1) 17/17/17 smooth dorsal scale rows; (2) single postocular; (3) loreal moderate; (4) temporals 1+2; (5) six supralabials, third and fourth contacting orbit; (6) six infralabials, first three contacting chinshields; (7) generally six maxillary teeth; (8) three gular scale rows; (9) generally three preventrals; (10) 165–169 ventrals in females, 149–154 in males; (11) 22–26 subcaudals in females, 26–30 in males; (12) dorsum grayish brown, except for first two dorsal scale rows creamish white; (13) venter and tail immaculate creamish white; (14) body size moderate in females (maximum SVL 381 mm), small in males (maximum SVL 265 mm); (15) tail small in females (9.1–10.8% SVL), moderate (13.1–14.3% SVL) in males; (16) hemipenis moderately bilobed, semicapitate, and semicalyculate [from Passos et al. 2010].

Diagnosis (kangueryensis): Atractus kangueryensis differs from A. albuquerquei, A.canedi, A. paraguayensis, A. reticulatus, and A. taeniatus by a higher number of dorsal scale rows (17 instead of 15); from A. reticulatus, A. serranus, A. trihedrurus, and A. snethlageae by a greater number of ventral scales (130-166 instead of 165-169); and from A. albuquerquei by a lower number of ventral scales (170-200 instead of 165-169). Additionally, it can be distinguished from A. albuquerquei and A. canedi by a lower number of sub-caudal scales (27-50 instead of 22-25); from A.paraguayensis, A. serranus, A. taeniatus, A. trihedrurus and A. snethlageae by a lower number of supralabials (7-8 instead of 6); and from A. canedi, A. pantostictus, A. paraguayensis, A. serranus, A. snethlageae and A. zebrinus by a lower number of infralabials (7-8 instead of 6). Finally, the color pattern of the new species is distinct from that of Atractus kangueryensis from A. canedi, A. paraguayensis, A. reticulatus, A. serranus, A. taeniatus, A. thalesdelemai, A. snethlageae and A.zebrinus. 
CommentSynonymy: Atractus kangueyrensis was synonymized with Atractus thalesdelemai by PASSOS et al. 2010.

Habitat (kangueryensis): natural grassland with several patches of Atlantic forest surrounding it. 
EtymologyNamed after Thales de Lema, Brazilian herpetologist.

Etymology (kangueryensis): The specific epithet “kangueryensis” is a proper noun from the type-locality. It comes from the Guarani language and means “water coming from the bones” (Kangue: bone; ry: liquid, water), in reference to a place where the tribe MbyaGuarani buried their members. It is also the name of a stream that flows 2000 m far from the location where the holotype was collected. 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Cacciali, P.; Villalba, R. & Yanosky, A.A. 2007. A NEW SPECIES OF ATRACTUS (SERPENTES:COLUBRIDAE: DIPSADINAE) FROM THE ATLANTIC FOREST OF ALTO PARANÁ, PARAGUAY. South American J. Herp. 2 (2): 83-88 - get paper here
  • Cacciali, Pier; Norman J. Scott, Aida Luz Aquino Ortíz, Lee A. Fitzgerald, and Paul Smith 2016. The Reptiles of Paraguay: Literature, Distribution, and an Annotated Taxonomic Checklist. SPECIAL PUBLICATION OF THE MUSEUM OF SOUTHWESTERN BIOLOGY, NUMBER 11: 1–373 - 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 - get paper here
  • Nogueira, Cristiano C.; Antonio J.S. Argôlo, Vanesa Arzamendia, Josué A. Azevedo, Fausto E. Barbo, Renato S. Bérnils, Bruna E. Bolochio, Marcio Borges-Martins, Marcela Brasil-Godinho, Henrique Braz, Marcus A. Buononato, Diego F. Cisneros-Heredia, 2019. Atlas of Brazilian snakes: verified point-locality maps to mitigate the Wallacean shortfall in a megadiverse snake fauna. South American J. Herp. 14 (Special Issue 1):1-274 - get paper here
  • Passos, P., R. Fernandes and Borges-Nojosa, D.M. 2007. A New Species of Atractus (Serpentes: Dipsadinae) from a Relictual Forest in Northeastern Brazil. Copeia 2007 (4): 788–797 - get paper here
  • Passos, P., R. Fernandes and N. Zanella 2005. A new species of Atractus (Serpentes: Colubridae) from Southern Brazil. Herpetologica 61 (2): 209-218 - get paper here
  • Passos, P.; Fernandes, R.; Bernils, R.S. & Moura-Leite, J.C. de 2010. Taxonomic revision of the Brazilian Atlantic Forest Atractus (Reptilia: Serpentes: Dipsadidae). Zootaxa 2364: 1–63 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
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