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Atractus boulengerii PERACCA, 1896

IUCN Red List - Atractus boulengerii - Data Deficient, DD
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymAtractus boulengerii PERACCA 1896
Atractus boulengerii — PETERS et al. 1970: 28
Atractus boulengerii — PASSOS et al. 2009
Atractus boulengerii — WALLACH et al. 2014: 69 
DistributionColombia (incl. Valle del Cauca)

Type locality: South America  
Reproductionoviparous 
TypesHolotype: MRSN (= MSNTO) R1832 
DiagnosisDiagnosis: Atractus boulengerii is distinguished from all congeners by the combination of the following characters: (1) 17/17/17 smooth dorsals; (2) two postoculars; (3) loreal long; (4) temporals 1+2; (5) seven supralabials, third and fourth contacting orbit; (6) six infralabials, first three contacting chinshields; (7) five maxillary teeth; (8) four gular scale rows; (9) four preventrals; (10) 176–189 ventrals in males; (11) 41–44 subcaudals in males; (12) dorsum beige with black round blotches decreasing in size posteriorly; (13) venter uniformly creamish white, tail brown pigmented on the median suture of subcaudals; (14) moderate body size, with male reaching 316 mm SVL; (15) long tail size in the male (16.8% SVL) [from PASSOS et al. 2009]. 
CommentExact type location and distribution unknown.

Abundance: Rare. This is one of the species called 'lost' and 'rediscovered' by Lindken et al. 2024. 
EtymologyNamed after George Albert Boulenger (1858-1937), herpetologist at the British Museum of Natural History, London. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Bernal, R. 2025. Serpientes de Colombia-Guía de Campo. Serie de Guías Tropicales de Campo. 19: 396 pp. Conservación Internacional Colombia, Bogotá - get paper here
  • Lindken T.; Anderson, C. V., Ariano-Sánchez, D., Barki, G., Biggs, C., Bowles, P., Chaitanya, R., Cronin, D. T., Jähnig, S. C., Jeschke, J. M., Kennerley, R. J., Lacher, T. E. Jr., Luedtke, J. A., Liu, C., Long, B., Mallon, D., Martin, G. M., Meiri, 2024. What factors influence the rediscovery of lost tetrapod species? Global Change Biology, 30: 1-18 - get paper here
  • Passos, P.; Mueses-Cisneros, J.J.; Lynch, J.D. & Fernandes, R. 2009. Pacific lowland snakes of the genus Atractus (Serpentes: Dipsadidae), with description of three new species. Zootaxa 2293: 1–34 - get paper here
  • Peracca, M. G. 1896. Sopra alcuni Ofidii nuovi o poco noti dell'America meridionale. Boll. Mus. Zool. Comp. Anat. Univ. Torino 11 (252): 1-4
  • Pérez-Santos,C. & Moreno, A.G. 1988. Ofidios de Colombia. Museo reegionale di Scienze Naturali, Torino, Monographie VI, 517 pp.
  • Peters, James A.; Donoso-Barros, Roberto & Orejas-Miranda, Braulio 1970. Catalogue of the Neotropical Squamata: Part I Snakes. Bull. US Natl. Mus. 297: 347 pp. - get paper here
  • Valencia-Zuleta A, Jaramillo-Martínez AF, Echeverry-Bocanegra A, Viáfara-Vega R, Hernández-Córdoba O, Cardona-Botero VE, Gutiérrez-Zúñiga J, Castro-Herrera F. 2014. Conservation status of the herpetofauna, protected areas, and current problems in Valle del Cauca, Colombia. Amphibian & Reptile Conservation 8 (2): 1–18 (e87) - 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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