A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India

Abstract The early evolution of archosauromorphs (bird- and crocodile-line archosaurs and stem-archosaurs) represents an important case of adaptive radiation that occurred in the aftermath of the Permo-Triassic mass extinction. Here we enrich the early archosauromorph record with the description of...

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Autores principales:	Saradee Sengupta, Martín D. Ezcurra, Saswati Bandyopadhyay
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8183adef7b7244ee8c2e1ac0cc571a99
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spelling	oai:doaj.org-article:8183adef7b7244ee8c2e1ac0cc571a992021-12-02T11:52:45ZA new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India10.1038/s41598-017-08658-82045-2322https://doaj.org/article/8183adef7b7244ee8c2e1ac0cc571a992017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08658-8https://doaj.org/toc/2045-2322Abstract The early evolution of archosauromorphs (bird- and crocodile-line archosaurs and stem-archosaurs) represents an important case of adaptive radiation that occurred in the aftermath of the Permo-Triassic mass extinction. Here we enrich the early archosauromorph record with the description of a moderately large (3–4 m in total length), herbivorous new allokotosaurian, Shringasaurus indicus, from the early Middle Triassic of India. The most striking feature of Shringasaurus indicus is the presence of a pair of large supraorbital horns that resemble those of some ceratopsid dinosaurs. The presence of horns in the new species is dimorphic and, as occurs in horned extant bovid mammals, these structures were probably sexually selected and used as weapons in intraspecific combats. The relatively large size and unusual anatomy of Shringasaurus indicus broadens the morphological diversity of Early–Middle Triassic tetrapods and complements the understanding of the evolutionary mechanisms involved in the early archosauromorph diversification.Saradee SenguptaMartín D. EzcurraSaswati BandyopadhyayNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Saradee Sengupta Martín D. Ezcurra Saswati Bandyopadhyay A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
description	Abstract The early evolution of archosauromorphs (bird- and crocodile-line archosaurs and stem-archosaurs) represents an important case of adaptive radiation that occurred in the aftermath of the Permo-Triassic mass extinction. Here we enrich the early archosauromorph record with the description of a moderately large (3–4 m in total length), herbivorous new allokotosaurian, Shringasaurus indicus, from the early Middle Triassic of India. The most striking feature of Shringasaurus indicus is the presence of a pair of large supraorbital horns that resemble those of some ceratopsid dinosaurs. The presence of horns in the new species is dimorphic and, as occurs in horned extant bovid mammals, these structures were probably sexually selected and used as weapons in intraspecific combats. The relatively large size and unusual anatomy of Shringasaurus indicus broadens the morphological diversity of Early–Middle Triassic tetrapods and complements the understanding of the evolutionary mechanisms involved in the early archosauromorph diversification.
format	article
author	Saradee Sengupta Martín D. Ezcurra Saswati Bandyopadhyay
author_facet	Saradee Sengupta Martín D. Ezcurra Saswati Bandyopadhyay
author_sort	Saradee Sengupta
title	A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
title_short	A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
title_full	A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
title_fullStr	A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
title_full_unstemmed	A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
title_sort	new horned and long-necked herbivorous stem-archosaur from the middle triassic of india
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8183adef7b7244ee8c2e1ac0cc571a99
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A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India

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