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Issue: Vol. 5646 No. 1: 6 Jun. 2025
Type: Article
Published: 2025-06-06
DOI: 10.11646/zootaxa.5646.1.5
Page range: 93-114
Abstract views: 247
PDF downloaded: 7

A new species of Sibon (Serpentes, Dipsadini) from French Guiana and amended diagnosis of Sibon nebulatus

Centre de Recherche sur la Biodiversité et l’Environnement; UMR 5300; CNRS; IRD; Université Paul Sabatier; Bâtiment 4R1; 118 Route de Narbonne; 31062 cedex 9; Toulouse; France
Khamai Foundation; Reserva Arlequín; Ecoruta Paseo del Quinde km 56; Santa Rosa de Mindo; Pichincha 171202; Ecuador; Tropical Herping S.A.; Quito; Ecuador
Programa de Pós-Graduação em Sistemática; Uso e Conservação da Biodiversidade; Núcleo Regional de Ofiologia; Centro de Ciências; Universidade Federal do Ceará; 60455-760; Fortaleza; CE; Brazil
Programa de Pós-Graduação em Sistemática; Uso e Conservação da Biodiversidade; Núcleo Regional de Ofiologia; Centro de Ciências; Universidade Federal do Ceará; 60455-760; Fortaleza; CE; Brazil
Reptilia Amazonia DNA Neotropics Herpetology Phylogeny Taxonomy

Abstract

Specimens of snakes from Mexico to northeastern Brazil have been assigned to the taxon Sibon nebulatus. Recent molecular data confirmed the previous suspicions that these specimens in fact belong to distinct species. After examination of the holotype and recently collected specimens, we provide an amended diagnosis and restrict the range of S. nebulatus to northern South America, implying that Central American populations belong to one or several undescribed species. We also describe Sibon nigralbus sp. nov., a new species from the Guiana region. Further investigation is needed to clarify the status of populations in Pará state, Brazil, and in the Magdalena valley in Colombia, where additional species possibly occur.

 

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How to Cite

Fouquet, A., Arteaga, A., Sousa, Átilas R.D. & Avila, R.W. (2025) A new species of Sibon (Serpentes, Dipsadini) from French Guiana and amended diagnosis of Sibon nebulatus. Zootaxa, 5646 (1), 93–114. https://doi.org/10.11646/zootaxa.5646.1.5