The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.

<h4>Background</h4>Central Patagonia, Argentina, preserves an abundant and rich fossil record. Among vertebrate fossils from the Upper Cretaceous Bajo Barreal Formation of Patagonia, five individuals of the small, non-avian theropod dinosaur Aniksosaurus darwini were recovered. Group beh...

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Autores principales:	Lucio M Ibiricu, Rubén D Martínez, Gabriel A Casal, Ignacio A Cerda
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6baaf85ee8de494f8ee49e6744920a96
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spelling	oai:doaj.org-article:6baaf85ee8de494f8ee49e6744920a962021-11-18T07:45:36ZThe behavioral implications of a multi-individual bonebed of a small theropod dinosaur.1932-620310.1371/journal.pone.0064253https://doaj.org/article/6baaf85ee8de494f8ee49e6744920a962013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23691183/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Central Patagonia, Argentina, preserves an abundant and rich fossil record. Among vertebrate fossils from the Upper Cretaceous Bajo Barreal Formation of Patagonia, five individuals of the small, non-avian theropod dinosaur Aniksosaurus darwini were recovered. Group behavior is an important aspect of dinosaur paleoecology, but it is not well-documented and is poorly understood among non-avian Theropoda.<h4>Methods/principal findings</h4>The taphonomic association of individuals from the Bajo Barreal Formation and aspects of their bone histology suggest gregarious behavior for Aniksosaurus, during at least a portion of the life history of this species. Histology indicates that the specimens were juvenile to sub-adult individuals. In addition, morphological differences between individuals, particularly proportions of the appendicular bones, are probably related to body-size dimorphism rather than ontogenetic stage.<h4>Conclusions/significance</h4>Gregarious behaviour may have conferred a selective advantage on Aniksosaurus individuals, contributing to their successful exploitation of the Cretaceous paleoenvironment preserved in the Bajo Barreal Formation. The monospecific assemblage of Aniksosaurus specimens constitutes only the second body fossil association of small, coelurosaurian theropods in South America and adds valuable information about the paleoecologies of non-avian theropod dinosaurs, particularly in the early Late Cretaceous of Patagonia.Lucio M IbiricuRubén D MartínezGabriel A CasalIgnacio A CerdaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 5, p e64253 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lucio M Ibiricu Rubén D Martínez Gabriel A Casal Ignacio A Cerda The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
description	<h4>Background</h4>Central Patagonia, Argentina, preserves an abundant and rich fossil record. Among vertebrate fossils from the Upper Cretaceous Bajo Barreal Formation of Patagonia, five individuals of the small, non-avian theropod dinosaur Aniksosaurus darwini were recovered. Group behavior is an important aspect of dinosaur paleoecology, but it is not well-documented and is poorly understood among non-avian Theropoda.<h4>Methods/principal findings</h4>The taphonomic association of individuals from the Bajo Barreal Formation and aspects of their bone histology suggest gregarious behavior for Aniksosaurus, during at least a portion of the life history of this species. Histology indicates that the specimens were juvenile to sub-adult individuals. In addition, morphological differences between individuals, particularly proportions of the appendicular bones, are probably related to body-size dimorphism rather than ontogenetic stage.<h4>Conclusions/significance</h4>Gregarious behaviour may have conferred a selective advantage on Aniksosaurus individuals, contributing to their successful exploitation of the Cretaceous paleoenvironment preserved in the Bajo Barreal Formation. The monospecific assemblage of Aniksosaurus specimens constitutes only the second body fossil association of small, coelurosaurian theropods in South America and adds valuable information about the paleoecologies of non-avian theropod dinosaurs, particularly in the early Late Cretaceous of Patagonia.
format	article
author	Lucio M Ibiricu Rubén D Martínez Gabriel A Casal Ignacio A Cerda
author_facet	Lucio M Ibiricu Rubén D Martínez Gabriel A Casal Ignacio A Cerda
author_sort	Lucio M Ibiricu
title	The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
title_short	The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
title_full	The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
title_fullStr	The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
title_full_unstemmed	The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
title_sort	behavioral implications of a multi-individual bonebed of a small theropod dinosaur.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/6baaf85ee8de494f8ee49e6744920a96
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The behavioral implications of a multi-individual bonebed of a small theropod dinosaur.

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