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New Species of Atractus Wagler, 1828 (Serpentes: Dipsadinae) from Guyana Plateau in Northern Brazil
Abstract A new species of Atractus is described from Serra do Surucucu, a mountain slope at 1,000 m in the Guyana Shield, State of Roraima, Brazil. This species, only known by females, is diagnosedExpand
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Sexual dimorphism and ontogenetic changes of Amazonian pit vipers (Bothrops atrox)
Abstract Sexual dimorphism of body size (SSD) is widespread in snakes and has been the subject of numerous studies, but few have examined sexual shape dimorphism (SShD). The present study exploresExpand
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Envenomation by Micrurus coral snakes in the Brazilian Amazon region: report of two cases.
Two cases of proven coral snake bites were reported in Belém, Pará State, Brazil. The first case was a severe one caused by Micrurus surinamensis. The patient required mechanical ventilation due toExpand
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Atlas of Brazilian Snakes: Verified Point-Locality Maps to Mitigate the Wallacean Shortfall in a Megadiverse Snake Fauna
Abstract. Accurate and detailed species distribution maps are fundamental for documenting and interpreting biological diversity. For snakes, an ecologically diverse group of reptiles, syntheses andExpand
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Patterns, biases and prospects in the distribution and diversity of Neotropical snakes
Abstract Motivation We generated a novel database of Neotropical snakes (one of the world's richest herpetofauna) combining the most comprehensive, manually compiled distribution dataset withExpand
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INTRASPECIFIC VARIATION OF THE HEMIPENIS IN SIPHLOPHIS AND TRIPANURGOS
HALL, W. P. 1970. Three probable cases of parthenogenesis in lizards (Agamidae, Chamaeleontidae, Gekkonidae). Experientia 26:1271-1273. HOUSTON, T. E 1974. Revision of the Amphibolurus decresiiExpand
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New Cryptic Species of Atractus (Serpentes: Dipsadidae) from Brazilian Amazonia
Abstract A new species of Atractus, previously reported as a disjunct population of A. zidoki south of the Amazon River, differs from all congeners in having an undivided sulcus spermaticus. Herein,Expand
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Consuming viscous prey: a novel protein-secreting delivery system in neotropical snail-eating snakes
BackgroundEfficient venom delivery systems are known to occur only in varanoid lizards and advanced colubroidean snakes among squamate reptiles. Although components of these venomous systems mightExpand
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Morphological variation and affinities of the poorly known snake Atractus caxiuana (Serpentes: Dipsadidae) .
Atractus caxiuana was recently described based on three specimens (two males and one female) from the Floresta Nacional de Caxiuanã, municipality of Melgaço, state of Pará, in the eastern portion ofExpand
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Species delimitations in the Atractus collaris complex (Serpentes: Dipsadidae).
We reassessed the taxonomic status of the species in the Atractus collaris complex (A. alphonsehogei, A. collaris, A. limitaneus, and A. gaigeae) on the basis of congruence between quantitative andExpand
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