Abstract
A new species of Atractus from the “Estação Científica Ferreira Penna”, Eastern Amazonia, Pará State, Brazil is described, and diagnosed by the following set of characters: 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.References
Claessen, H. (2001) De slangen van de Guyana’s. Deel I. Lacerta, 59 (6), 221–230.
Claessen, H. (2003a) De slangen van de Guyana’s. Deel IV. Lacerta, 61(1), 19–27.
Claessen, H. (2003b) De slangen van de Guyana’s. Deel V. Lacerta, 61 (4), 124–133.
Cunha, O.R. da, & Nascimento, F.P. (1980) Ofídios da Amazônia XI—Ofídios de Roraima e notas sobre Erythrolamprus bauperthuissi Duméril, Bibron & Duméril, 1854, sinônimo de Erythrolamprus aesculapii aesculapii (Linnaeus, 1758). Boletim do Museu Paraense Emílio Goeldi, Zoologia, 102, 1–21.
Cunha, O.R. da, & Nascimento, F.P. (1983) Ofídios da Amazônia. XX—As espécies de Atractus Wagler, 1828 na Amazônia Oriental e Maranhão (Ophidia: Colubridae). Boletim do Museu Paraense Emílio Goeldi, Zoologia, 123, 1–38.
Cunha, O.R. da, & Nascimento, F.P. (1984) Ofídios da Amazônia. XXI—Atractus zidoki no leste do Pará e notas sobre A. alphonsehogei e A. schach (Ophidia: Colubridae). Boletim do Museu Paraense Emílio Goeldi, Zoologia, 1 (2), 219–228.
Cunha, O.R. da, & Nascimento, F.P. (1993) Ofídios da Amazônia—As cobras da região leste do Pará (2nd edition). Boletim do Museu Paraense Emílio Goeldi, Zoologia, 9 (1), 1–191.
Dowling, H.G. (1951) A proposed standard system of counting ventral in snakes. Journal of Herpetology, 1 (5), 97–99.
Haad, J.J.S. (2004) Las serpientes do género Atractus Wagler, 1828 (Colubridae, Xenodontinae) en la Amazonia Colombiana. Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 28 (108), 1–446.
Hoogmoed, M.S. (1980) Revision of the genus Atractus in Surinam, with the resurrection of two species (Colubridae, Reptilia). Notes on the herpetofauna of Surinam VII. Zoologische Verhandelingen, 175, 3–47.
Hoogmoed, M.S. (1982) Nomenclatural problems relating to Atractus trilineatus Wagler, 1828. Zoologische Mededelingen, 56 (10), 131–138.
Hoogmoed, M.S. & Prudente, A.L.C. (2003) A new species of Atractus (Reptilia: Ophidia: Colubridae: Dipsadinae) from the Amazon forest region in Brazil. Zoologische Mededelingen, 77, 425–439.
Martins, M., & Oliveira, M.E. (1993) The snakes of the genus Atractus Wagler (Reptilia: Squamata: Colubridae) from the Manaus region, central Amazonia, Brazil. Zoologische Mededelingen, 67 (2), 21–40.
Myers, C.W. (2003) Rare snakes – Five New Species from Eastern Panama: Reviews of Northern Atractus and Southern Geophis (Colubridae: Dipsadinae). American Museum Novitates, 3391, 1–47.
Myers, C.W. & Campbell, J.A. (1981) A new genus and species of colubrid snake from Sierra Madre del Sur of Guerrero, Mexico. American Museum Novitates, 2708, 1–20.
Passos, P., Fernades, R. & Zanella, N. (2005). A new species of Atractus (Serpentes: Colubridae) from south Brazil. Herpetologica, 61, 209–218.
Peters, J.A., & Orejas-Miranda, B. (1970) Catalogue of the neotropical Squamata: Part I. Snakes. U. S. National Museum Bulletim, 297, i–viii, 1–347.
Prudente, A.L.C. & Santos-Costa, M.C. (2005) New Records of Snakes in the Eastern Amazon, Pará State, Brazil: “Floresta Nacional de Caxiuanã”. Boletim do Museu Paraense Emílio Goeldi,série Ciências Naturais, 1 (3), 243–251.
Roze, J.A (1961) El genero Atractus (Serpentes: Colubridae) en Venezuela. Acta Biológica Venezuelica, 3, 103–119.
Roze, J.A. (1966) La taxonomía y zoogeografía de los ofidios en Venezuela. Universidad Central de Venezuela, Caracas, 362 pp.
Savage, J.M. (1960) A revision of the Ecuadorian Snakes of the Colubrid Genus Atractus. Miscellaneous Publications, Museum of Zoology, 112, 1–86.
Schargel, W.E., & García-Pérez, J.E. (2002) A New Species and a new Record of Atractus (Serpentes: Colubridae) from the Andes of Venezuela. Journal of Herpetology, 36 (3), 398–402.
Zaher, H & Prudente, A.L.C. (2003) Hemipenis of Siphlophis (Serpentes, Xenodontinae) and techniques of hemipenial preparation in snakes: A response to Dowling. Herpetological Review, 34 (4), 302–307.