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Atractus iridescens PERACCA, 1896

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Iridescent Ground Snake 
SynonymAtractus iridescens PERACCA 1896
Atractus iridescens — PETERS et al. 1970: 30
Atractus iridescens — PASSOS et al. 2009
Atractus iridescens — WALLACH et al. 2014: 74 
DistributionColombia, Ecuador

Type locality: South America  
TypesHolotype: MRSN (= MSNTO) R1830 
DiagnosisDiagnosis: Atractus iridescens is distinguished from all congeners by combination of the following characters: (1) 17/17/17 smooth dorsal scale rows; (2) two postoculars; (3) loreal long; (4) temporals 1+2; (5) seven supralabials, third and fourth contacting orbit; (6) seven infralabials, first three or four contacting chinshields; (7) six or seven maxillary teeth; (8) generally four gular scale rows; (9) three preventrals; (10) 135–144 ventrals in females, 135–150 in males; (11) 25–37 subcaudals in females, 33–38 in males; (12) dorsum reddish brown scattered with small and irregular dark blotches; (13) venter beige with a median line comprised of small black dots; (14) moderate body size, single subadult female with 170 mm SVL, males reaching 353 mm SVL; (15) long tail in females (16.4–17.6% SVL) and males (14.2–18.9% SVL); (16) hemipenis moderately bilobed, slightly semicapitate, and non-calyculate [from PASSOS et al. 2009]. 
CommentSpecies group: Arteaga et al. 2017 defined the iridescens species group as derived from a molecular phylogeny, to contain Atractus cerberus sp. n., A. dunni, A. echidna, A. esepe sp. n., A. iridescens, A. microrhynchus and A. occidentalis. 
  • Arteaga A, Mebert K, Valencia JH, Cisneros-Heredia DF, Peñafiel N, Reyes-Puig C, Vieira-Fernandes JL, Guayasamin JM 2017. Molecular phylogeny of Atractus (Serpentes, Dipsadidae), with emphasis on Ecuadorian species and the description of three new taxa. ZooKeys 661: 91-123. - 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
  • Pinto-Erazo, M.A., Calderón-Espinosa, M.L., Medina-Rangel, G.F. & Méndez-Galeano, M.A. 2020. Herpetofauna from two municipalities of southwestern Colombia. Biota Colombiana 21(1): 41-57. DOI: 10.21068/c2020.v21n01a04 - get paper here
  • Torres-Carvajal O, Pazmiño-Otamendi G, Salazar-Valenzuela D. 2019. Reptiles of Ecuador: a resource-rich portal, with a dynamic checklist and photographic guides. Amphibian & Reptile Conservation 13 (1): [General Section]: 209–229 (e178) - 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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