Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity

Abstract Sauropodomorph dinosaurs were the dominant medium to large-sized herbivores of most Mesozoic continental ecosystems, being characterized by their long necks and reaching a size unparalleled by other terrestrial animals (> 60 tonnes). Our study of morphological disparity across the entire...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Cecilia Apaldetti, Diego Pol, Martín D. Ezcurra, Ricardo N. Martínez
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c4e41619cd874bdd88f3421e2484b11d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c4e41619cd874bdd88f3421e2484b11d
record_format	dspace
spelling	oai:doaj.org-article:c4e41619cd874bdd88f3421e2484b11d2021-11-21T12:16:41ZSauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity10.1038/s41598-021-01120-w2045-2322https://doaj.org/article/c4e41619cd874bdd88f3421e2484b11d2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01120-whttps://doaj.org/toc/2045-2322Abstract Sauropodomorph dinosaurs were the dominant medium to large-sized herbivores of most Mesozoic continental ecosystems, being characterized by their long necks and reaching a size unparalleled by other terrestrial animals (> 60 tonnes). Our study of morphological disparity across the entire skeleton shows that during the Late Triassic the oldest known sauropodomorphs occupied a small region of morphospace, subsequently diversifying both taxonomically and ecologically, and shifting to a different and broader region of the morphospace. After the Triassic–Jurassic boundary event, there are no substancial changes in sauropodomorph morphospace occupation. Almost all Jurassic sauropodomorph clades stem from ghost lineages that cross the Triassic–Jurassic boundary, indicating that variations after the extinction were more related to changes of pre-existing lineages (massospondylids, non-gravisaurian sauropodiforms) rather than the emergence of distinct clades or body plans. Modifications in the locomotion (bipedal to quadrupedal) and the successive increase in body mass seem to be the main attributes driving sauropodomorph morphospace distribution during the Late Triassic and earliest Jurassic. The extinction of all non-sauropod sauropodomorphs by the Toarcian and the subsequent diversification of gravisaurian sauropods represent a second expansion of the sauropodomorph morphospace, representing the onset of the flourishing of these megaherbivores that subsequently dominated in Middle and Late Jurassic terrestrial assemblages.Cecilia ApaldettiDiego PolMartín D. EzcurraRicardo N. MartínezNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cecilia Apaldetti Diego Pol Martín D. Ezcurra Ricardo N. Martínez Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
description	Abstract Sauropodomorph dinosaurs were the dominant medium to large-sized herbivores of most Mesozoic continental ecosystems, being characterized by their long necks and reaching a size unparalleled by other terrestrial animals (> 60 tonnes). Our study of morphological disparity across the entire skeleton shows that during the Late Triassic the oldest known sauropodomorphs occupied a small region of morphospace, subsequently diversifying both taxonomically and ecologically, and shifting to a different and broader region of the morphospace. After the Triassic–Jurassic boundary event, there are no substancial changes in sauropodomorph morphospace occupation. Almost all Jurassic sauropodomorph clades stem from ghost lineages that cross the Triassic–Jurassic boundary, indicating that variations after the extinction were more related to changes of pre-existing lineages (massospondylids, non-gravisaurian sauropodiforms) rather than the emergence of distinct clades or body plans. Modifications in the locomotion (bipedal to quadrupedal) and the successive increase in body mass seem to be the main attributes driving sauropodomorph morphospace distribution during the Late Triassic and earliest Jurassic. The extinction of all non-sauropod sauropodomorphs by the Toarcian and the subsequent diversification of gravisaurian sauropods represent a second expansion of the sauropodomorph morphospace, representing the onset of the flourishing of these megaherbivores that subsequently dominated in Middle and Late Jurassic terrestrial assemblages.
format	article
author	Cecilia Apaldetti Diego Pol Martín D. Ezcurra Ricardo N. Martínez
author_facet	Cecilia Apaldetti Diego Pol Martín D. Ezcurra Ricardo N. Martínez
author_sort	Cecilia Apaldetti
title	Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
title_short	Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
title_full	Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
title_fullStr	Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
title_full_unstemmed	Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity
title_sort	sauropodomorph evolution across the triassic–jurassic boundary: body size, locomotion, and their influence on morphological disparity
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c4e41619cd874bdd88f3421e2484b11d
work_keys_str_mv	AT ceciliaapaldetti sauropodomorphevolutionacrossthetriassicjurassicboundarybodysizelocomotionandtheirinfluenceonmorphologicaldisparity AT diegopol sauropodomorphevolutionacrossthetriassicjurassicboundarybodysizelocomotionandtheirinfluenceonmorphologicaldisparity AT martindezcurra sauropodomorphevolutionacrossthetriassicjurassicboundarybodysizelocomotionandtheirinfluenceonmorphologicaldisparity AT ricardonmartinez sauropodomorphevolutionacrossthetriassicjurassicboundarybodysizelocomotionandtheirinfluenceonmorphologicaldisparity
_version_	1718419149342900224

Sauropodomorph evolution across the Triassic–Jurassic boundary: body size, locomotion, and their influence on morphological disparity

Ejemplares similares