Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.

Psittacosaurus is one of the most abundant and speciose genera in the Dinosauria, with fifteen named species. The genus is geographically and temporally widespread with large sample sizes of several of the nominal species allowing detailed analysis of intra- and interspecific variation. We present a...

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Autores principales:	Brandon P Hedrick, Peter Dodson
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d94c09035c274dbb8a2c26ebc69f0d7d
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spelling	oai:doaj.org-article:d94c09035c274dbb8a2c26ebc69f0d7d2021-11-18T09:00:30ZLujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.1932-620310.1371/journal.pone.0069265https://doaj.org/article/d94c09035c274dbb8a2c26ebc69f0d7d2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23950887/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Psittacosaurus is one of the most abundant and speciose genera in the Dinosauria, with fifteen named species. The genus is geographically and temporally widespread with large sample sizes of several of the nominal species allowing detailed analysis of intra- and interspecific variation. We present a reanalysis of three separate, coeval species within the Psittacosauridae; P. lujiatunensis, P. major, and Hongshanosaurus houi from the Lujiatun beds of the Yixian Formation, northeastern China, using three-dimensional geometric morphometrics on a sample set of thirty skulls in combination with a reevaluation of the proposed character states for each species. Using these complementary methods, we show that individual and taphonomic variation are the joint causes of a large range of variation among the skulls when they are plotted in a morphospace. Our results demonstrate that there is only one species of Psittacosaurus within the Lujiatun beds and that the three nominal species represent different taphomorphotypes of P. lujiatunensis. The wide range of geometric morphometric variation in a single species of Psittacosaurus implies that the range of variation found in other dinosaurian groups may also be related to taphonomic distortion rather than interspecific variation. As the morphospace is driven primarily by variation resulting from taphonomic distortion, this study demonstrates that the geometric morphometric approach can only be used with great caution to delineate interspecific variation in Psittacosaurus and likely other dinosaur groups without a complementary evaluation of character states. This study presents the first application of 3D geometric morphometrics to the dinosaurian morphospace and the first attempt to quantify taphonomic variation in dinosaur skulls.Brandon P HedrickPeter DodsonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 8, p e69265 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Brandon P Hedrick Peter Dodson Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
description	Psittacosaurus is one of the most abundant and speciose genera in the Dinosauria, with fifteen named species. The genus is geographically and temporally widespread with large sample sizes of several of the nominal species allowing detailed analysis of intra- and interspecific variation. We present a reanalysis of three separate, coeval species within the Psittacosauridae; P. lujiatunensis, P. major, and Hongshanosaurus houi from the Lujiatun beds of the Yixian Formation, northeastern China, using three-dimensional geometric morphometrics on a sample set of thirty skulls in combination with a reevaluation of the proposed character states for each species. Using these complementary methods, we show that individual and taphonomic variation are the joint causes of a large range of variation among the skulls when they are plotted in a morphospace. Our results demonstrate that there is only one species of Psittacosaurus within the Lujiatun beds and that the three nominal species represent different taphomorphotypes of P. lujiatunensis. The wide range of geometric morphometric variation in a single species of Psittacosaurus implies that the range of variation found in other dinosaurian groups may also be related to taphonomic distortion rather than interspecific variation. As the morphospace is driven primarily by variation resulting from taphonomic distortion, this study demonstrates that the geometric morphometric approach can only be used with great caution to delineate interspecific variation in Psittacosaurus and likely other dinosaur groups without a complementary evaluation of character states. This study presents the first application of 3D geometric morphometrics to the dinosaurian morphospace and the first attempt to quantify taphonomic variation in dinosaur skulls.
format	article
author	Brandon P Hedrick Peter Dodson
author_facet	Brandon P Hedrick Peter Dodson
author_sort	Brandon P Hedrick
title	Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
title_short	Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
title_full	Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
title_fullStr	Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
title_full_unstemmed	Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.
title_sort	lujiatun psittacosaurids: understanding individual and taphonomic variation using 3d geometric morphometrics.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/d94c09035c274dbb8a2c26ebc69f0d7d
work_keys_str_mv	AT brandonphedrick lujiatunpsittacosauridsunderstandingindividualandtaphonomicvariationusing3dgeometricmorphometrics AT peterdodson lujiatunpsittacosauridsunderstandingindividualandtaphonomicvariationusing3dgeometricmorphometrics
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Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics.

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