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Systematics of the Enigmatic Dipsadine Snake Tropidodipsas perijanensis Alemán (Serpentes: Colubridae) and Review of Morphological Characters of Dipsadini

Systematics of the Enigmatic Dipsadine Snake Tropidodipsas perijanensis Alemán (Serpentes:... On the basis of new material from Colombia, we describe external morphology, the hemipenis, osteology, musculature, and visceral morphology of Tropidodipsas perijanensis , a species previously known from the unique holotype and long assigned to Dipsas . Tropidodipsas perijanensis may be the sister species of all other Dipsadini or the sister species of a clade formed by Dipsas and Sibynomorphus . This distinctive South American species cannot be assigned to Tropidodipsas or to any other genus, and we erect a new genus for it. Our study of cephalic musculature identified a previously unreported division of the m. levator anguli oris and new insertion of the m. intermandibularis posterior superficialis . New characteristics of dipsadine hemipenes were visualized by Alizarin staining. Some osteological characters of Dipsadini support synonymization of Sibon and most species of Tropidodipsas , whereas visceral characters and published molecular data suggest that Dipsas , Sibon , and Sibynomorphus form a clade. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Herpetological Monographs Allen Press

Systematics of the Enigmatic Dipsadine Snake Tropidodipsas perijanensis Alemán (Serpentes: Colubridae) and Review of Morphological Characters of Dipsadini

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References (49)

Publisher
Allen Press
Copyright
The Herpetologists' League, Inc.
Subject
Articles
ISSN
0733-1347
eISSN
1938-5137
DOI
10.1655/08-025.1
Publisher site
See Article on Publisher Site

Abstract

On the basis of new material from Colombia, we describe external morphology, the hemipenis, osteology, musculature, and visceral morphology of Tropidodipsas perijanensis , a species previously known from the unique holotype and long assigned to Dipsas . Tropidodipsas perijanensis may be the sister species of all other Dipsadini or the sister species of a clade formed by Dipsas and Sibynomorphus . This distinctive South American species cannot be assigned to Tropidodipsas or to any other genus, and we erect a new genus for it. Our study of cephalic musculature identified a previously unreported division of the m. levator anguli oris and new insertion of the m. intermandibularis posterior superficialis . New characteristics of dipsadine hemipenes were visualized by Alizarin staining. Some osteological characters of Dipsadini support synonymization of Sibon and most species of Tropidodipsas , whereas visceral characters and published molecular data suggest that Dipsas , Sibon , and Sibynomorphus form a clade.

Journal

Herpetological MonographsAllen Press

Published: Dec 1, 2008

Keywords: Dipsas perijanensis ; Dipsas sanctijoannis ; Lung morphology ; Musculature ; Osteology ; Plesiodipsas new genus ; Sibon ; Sibynomorphus ; Tropidodipsas

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