Título:	An evolutionary paradox on threadsnakes : phenotypic and molecular evidence reveal a new and remarkably polymorphic species of Siagonodon (Serpentes: Leptotyphlopidae: Epictinae) from Amazonia
Autor(es):	Martins, Angele dos Reis Folly, Manuella Ferreira, Guilherme Nunes Silva, Antônio Samuel Garcia da Koch, Claudia Fouquet, Antoine Machado, Alessandra Lopes, Ricardo Tadeu Pinto, Roberta Rodrigues, Miguel Trefaut Passos, Paulo
Afiliação do autor:	Universidade de Brasília, Departamento de Ciências Fisiológicas Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Vertebrados Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Vertebrados Universidade Federal do Oeste do Pará, Programa de Pós-graduação em Biodiversidade Aveverde Soluções Ambientais Leibniz Institute for the Analysis of Biodiversity Change (LIB), Museum Alexander Koenig Laboratoire Evolution et Diversité Biologique (EDB) Universidade Federal do Rio de Janeiro, Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa em Engenharia, Laboratório de Instrumentação Nuclear Universidade Católica de Pernambuco, Museu de Arqueologia e Ciências Naturais, Laboratório de Diversidade de Anfíbios e Répteis Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia
Assunto:	Morfologia hemipeniana Ossos Filogenia Polimorfismo (Genética)
Data de publicação:	2023
Editora:	Pensoft
Referência:	MARTINS, Angele et al. An evolutionary paradox on threadsnakes : phenotypic and molecular evidence reveal a new and remarkably polymorphic species of Siagonodon (Serpentes: Leptotyphlopidae: Epictinae) from Amazonia. Vertebrate Zoology, v. 73, p. 345-366, 2023. DOI: https://doi.org/10.3897/vz.73.e98170. Disponível em: https://vertebrate-zoology.arphahub.com/article/98170/. Acesso em: 10 out. 2023.
Abstract:	Threadsnakes are known for their conserved external morphology and historically controversial systematics, challenging taxonomic, biogeographic and evolutionary researches in these fields. Recent morphological studies—mostly based on μCT data of the skull and lower jaw—have resolved systematic issues within the group, for instance leading to the description of new taxa or re-positioning little-known scolecophidian taxa in the tree of life. Herein we describe a new polymorphic species of the genus Siagonodon from Amazonia based on morphological (external, osteology and hemipenis) and molecular data, and provide the first hemipenial description for the genus. We also reassign Siagonodon acutirostris to the genus Trilepida based on osteological data in combination with molecular evidence. The new species described represents an evolutionary paradox for scolecophidians because the species displays a remarkable variation in the shape of the snout region that is otherwise always highly conserved in this clade. Finally, this study reinforces the importance of protected areas as essential in maintaining vertebrate populations, including those that are not yet formally described.
Licença:	Copyright Angele Martins et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI:	https://doi.org/10.3897/vz.73.e98170
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