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1 September 2010 New Cryptic Species of Atractus (Serpentes: Dipsadidae) from Brazilian Amazonia
Ana L. C. Prudente, Paulo Passos
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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, we restrict the concept of A. zidoki to populations north of the Amazon River, provide a detailed description of its everted hemipenis, and describe a new species to accommodate the population occurring to the south of the Amazon River. Additionally, we briefly discuss intraspecific variation and the systematic value of the hemipenis structure in snakes, mainly with respect to the genus Atractus.

2010 by the American Society of Ichthyologists and Herpetologists
Ana L. C. Prudente and Paulo Passos "New Cryptic Species of Atractus (Serpentes: Dipsadidae) from Brazilian Amazonia," Copeia 2010(3), 397-404, (1 September 2010). https://doi.org/10.1643/CH-08-193
Received: 19 October 2008; Accepted: 1 April 2010; Published: 1 September 2010
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