You are here » home advanced search search results Atractus caxiuana

Atractus caxiuana COSTA PRUDENTE & SANTOS-COSTA, 2006

Can you confirm these amateur observations of Atractus caxiuana?

Add your own observation of
Atractus caxiuana »

Find more photos by Google images search: Google images

Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymAtractus caxiuana COSTA-PRUDENTE & SANTOS-COSTA 2006
Atractus caxiuana — WALLACH et al. 2014: 70
Atractus caxiuana — NOGUEIRA et al. 2019 
DistributionS Brazil (Pará) through Colombia (Vaupés)

Type locality: “Estação Científica Ferreira Penna”, Eastern Amazonia, Pará State, Brazil  
TypesHolotype: MPEG 19657 
DiagnosisDiagnosis: 17-17-17 smooth dorsal scales without pits; 162 ventrals and 30 pairs of subcaudals in the single measurable male and 171 ventrals and 24 pairs of subcaudals in the single avaliable female; the three available specimens (two males and one female) has frontal wider than long; nasal contacting loreal, internasals, rostral, and the two first pairs of supralabials; loreal contacting internasal, and second and third supralabials; preocular absent; two postoculars; two light spots on the back of the head; wide-black median ventral band; and subcaudals totally black.

Diagnosis. Atractus caxiuana is distinguished from all other congeners by the following combination of characters: loreal contacting the internasal (but see below); 17/17/17 dorsal scale rows with paired apical pits in both sexes and supra-anal tubercles present only in males; one or two postoculars; loreal moderately long; temporals 1+2; seven supralabials, third and fourth contacting orbit; seven infralabials, first three contacting chinshields; five or six maxillary teeth; four gular scale rows; four preventrals; 171–184 ventrals in females, 160– 162 in males; 18–24 subcaudals in females, 25–30 in males; dorsum mostly dark brown, except for dispersed beige blotches on snout, a creamy incomplete collar covering the parietal, occipital and temporal regions of the head, and two pale brown longitudinal stripes covering the centre of first two dorsal scale rows of the body; belly creamy with lateral portion of the ventral scales dark brown, forming paraventral stripes; small body size, females reaching 265 mm SVL, males 261 mm SVL; small tail length in females (9.0–9.2% SVL), moderately long in males (9.2– 13.2% SVL); hemipenis slightly bilobed, non-capitate and non-calyculate [Passos et al. 2013: 40]. 
CommentHabitat: rainforest 
EtymologyNamed after the type-locality, derived from the Tupi language and meaning “the place with plenty of snakes”. 
  • 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, PAULO; ANA L. C. PRUDENTE, LUCIANA O. RAMOS, JOSÉ RANCES CAICEDO-PORTILLA, JOHN D. LYNCH 2018. Species delimitations in the Atractus collaris complex (Serpentes: Dipsadidae). Zootaxa 4392 (3): 491–520 - get paper here
  • PASSOS, PAULO; LUCIANA O. RAMOS, PEDRO H. PINNA, ANA L.C. PRUDENTE 2013. Morphological variation and affinities of the poorly known snake Atractus caxiuana (Serpentes: Dipsadidae). Zootaxa 3745 (1): 035–048 - get paper here
  • Prudente, A. L. da & Santos-Costa, M. C. dos 2006. A new species of Atractus Wagler, 1828 (Serpentes: Colubridae) from Eastern Amazonia, Brazil. Zootaxa 1285: 21–29 - get paper here
  • Prudente, Ana L.C and Paulo Passos 2008. New Species of Atractus Wagler, 1828 (Serpentes: Dipsadinae) from Guyana Plateau in Northern Brazil. Journal of Herpetology 42 (4): 723 - 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.
External links  
Is it interesting? Share with others:

As link to this species use URL address:

without field 'search_param'. Field 'search_param' is used for browsing search result.

Please submit feedback about this entry to the curator