A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.

<h4>Background</h4>Basal sauropodomorphs, or 'prosauropods,' are a globally widespread paraphyletic assemblage of terrestrial herbivorous dinosaurs from the Late Triassic and Early Jurassic. In contrast to several other landmasses, the North American record of sauropodomorphs d...

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Autores principales:	Joseph J W Sertich, Mark A Loewen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d1e38a9bbbb6413689f820f97ffe33ad
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spelling	oai:doaj.org-article:d1e38a9bbbb6413689f820f97ffe33ad2021-11-25T06:25:10ZA new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.1932-620310.1371/journal.pone.0009789https://doaj.org/article/d1e38a9bbbb6413689f820f97ffe33ad2010-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20352090/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Basal sauropodomorphs, or 'prosauropods,' are a globally widespread paraphyletic assemblage of terrestrial herbivorous dinosaurs from the Late Triassic and Early Jurassic. In contrast to several other landmasses, the North American record of sauropodomorphs during this time interval remains sparse, limited to Early Jurassic occurrences of a single well-known taxon from eastern North America and several fragmentary specimens from western North America.<h4>Methodology/principal findings</h4>On the basis of a partial skeleton, we describe here a new basal sauropodomorph dinosaur from the Lower Jurassic Navajo Sandstone of southern Utah, Seitaad ruessi gen. et sp. nov. The partially articulated skeleton of Seitaad was likely buried post-mortem in the base of a collapsed dune foreset. The new taxon is characterized by a plate-like medial process of the scapula, a prominent proximal expansion of the deltopectoral crest of the humerus, a strongly inclined distal articular surface of the radius, and a proximally and laterally hypertrophied proximal metacarpal I.<h4>Conclusions/significance</h4>Phylogenetic analysis recovers Seitaad as a derived basal sauropodomorph closely related to plateosaurid or massospondylid 'prosauropods' and its presence in western North America is not unexpected for a member of this highly cosmopolitan clade. This occurrence represents one of the most complete vertebrate body fossil specimens yet recovered from the Navajo Sandstone and one of the few basal sauropodomorph taxa currently known from North America.Joseph J W SertichMark A LoewenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 3, p e9789 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Joseph J W Sertich Mark A Loewen A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
description	<h4>Background</h4>Basal sauropodomorphs, or 'prosauropods,' are a globally widespread paraphyletic assemblage of terrestrial herbivorous dinosaurs from the Late Triassic and Early Jurassic. In contrast to several other landmasses, the North American record of sauropodomorphs during this time interval remains sparse, limited to Early Jurassic occurrences of a single well-known taxon from eastern North America and several fragmentary specimens from western North America.<h4>Methodology/principal findings</h4>On the basis of a partial skeleton, we describe here a new basal sauropodomorph dinosaur from the Lower Jurassic Navajo Sandstone of southern Utah, Seitaad ruessi gen. et sp. nov. The partially articulated skeleton of Seitaad was likely buried post-mortem in the base of a collapsed dune foreset. The new taxon is characterized by a plate-like medial process of the scapula, a prominent proximal expansion of the deltopectoral crest of the humerus, a strongly inclined distal articular surface of the radius, and a proximally and laterally hypertrophied proximal metacarpal I.<h4>Conclusions/significance</h4>Phylogenetic analysis recovers Seitaad as a derived basal sauropodomorph closely related to plateosaurid or massospondylid 'prosauropods' and its presence in western North America is not unexpected for a member of this highly cosmopolitan clade. This occurrence represents one of the most complete vertebrate body fossil specimens yet recovered from the Navajo Sandstone and one of the few basal sauropodomorph taxa currently known from North America.
format	article
author	Joseph J W Sertich Mark A Loewen
author_facet	Joseph J W Sertich Mark A Loewen
author_sort	Joseph J W Sertich
title	A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
title_short	A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
title_full	A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
title_fullStr	A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
title_full_unstemmed	A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.
title_sort	new basal sauropodomorph dinosaur from the lower jurassic navajo sandstone of southern utah.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/d1e38a9bbbb6413689f820f97ffe33ad
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A new Basal sauropodomorph dinosaur from the Lower Jurassic Navajo sandstone of Southern Utah.

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