Evolutionary treasures hidden in the West Indies : comparative osteology and visceral morphology reveals intricate miniaturization in the insular genera Mitophis Hedges, Adalsteinsson, & Branch, 2009 and Tetracheilostoma Jan, 1861 (Leptotyphlopidae: Epictinae: Tetracheilostomina)

Martins, Angele dos Reis; Koch, Claudia; Joshi, Mitali; Pinto, Roberta; Machado, Alessandra; Lopes, Ricardo; Passos, Paulo

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Campo DC	Valor	Idioma
dc.contributor.author	Martins, Angele dos Reis	-
dc.contributor.author	Koch, Claudia	-
dc.contributor.author	Joshi, Mitali	-
dc.contributor.author	Pinto, Roberta	-
dc.contributor.author	Machado, Alessandra	-
dc.contributor.author	Lopes, Ricardo	-
dc.contributor.author	Passos, Paulo	-
dc.date.accessioned	2022-04-12T11:44:57Z	-
dc.date.available	2022-04-12T11:44:57Z	-
dc.date.issued	2021	-
dc.identifier.citation	MARTINS, Angele et al. Evolutionary treasures hidden in the West Indies: comparative osteology and visceral morphology reveals intricate miniaturization in the insular genera Mitophis Hedges, Adalsteinsson, & Branch, 2009 and Tetracheilostoma Jan, 1861 (Leptotyphlopidae: Epictinae: Tetracheilostomina). The Anatomical Record, v. 304, n. 10, p. 2118-2148, 2021. DOI: https://doi.org/10.1002/ar.24716. Disponível em: https://anatomypubs.onlinelibrary.wiley.com/doi/10.1002/ar.24716. Acesso em: 12 abr. 2021.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/43372	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Wiley	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Evolutionary treasures hidden in the West Indies : comparative osteology and visceral morphology reveals intricate miniaturization in the insular genera Mitophis Hedges, Adalsteinsson, & Branch, 2009 and Tetracheilostoma Jan, 1861 (Leptotyphlopidae: Epictinae: Tetracheilostomina)	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Nanismo	pt_BR
dc.subject.keyword	Ossos	pt_BR
dc.subject.keyword	Cobras	pt_BR
dc.subject.keyword	Vísceras	pt_BR
dc.rights.license	© 2021 American Association for Anatomy.	pt_BR
dc.identifier.doi	https://doi.org/10.1002/ar.24716	pt_BR
dc.relation.publisherversion	https://anatomypubs.onlinelibrary.wiley.com/doi/10.1002/ar.24716	pt_BR
dc.description.abstract1	The genera Mitophis and Tetracheilostoma comprise two extant lineages of small-sized threadsnakes that exclusively inhabit several islands of the West Indies. Even though leptotyphlopids are known for their extremely reduced size, miniaturization has only been hypothesized to reflect insular dwarfism for the genus Tetracheilostoma. Herein, we aim to describe the comparative osteology and visceral morphology of both genera, investigating and discussing their several internal morphological simplifications and novelties. Our results indicate that these taxa exhibit several autapomorphies mostly concentrated in the dorsoposterior skull elements and maxillae, as well as in their axial skeleton and viscera. These novelties and simplifications are most likely a result of extreme miniaturization driven by the evolutionary constraints or ecological opportunities possibly imposed by the “island rule.” Both Mitophis and Tetracheilostoma distinguish from all other Epictinae in lacking a dentigerous process in the maxillae, by having the prootic fused to the otooccipital, and by the lack (except in comparison to a few Epictia) of a cervical vertebrae intercentrum I. Additionally, Mitophis can be distinguished from other Epictinae by the participation of the unpaired supraoccipital in the dorsal border of the foramen magnum, by the absence of the pleurapophyses in the caudal vertebrae, by a higher number of liver segments, and by the extreme degeneration of the pelvic rudiments. Tetracheilostoma differs from other Epictinae by lacking a distinct supraoccipital, which is fused to the parietal. Thus, our results reinforce that morphological characters are extremely valuable for leptotyphlopid systematics given their extremely conserved external morphology.	pt_BR
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