A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.

<h4>Background</h4>The Troodontidae represents one of the most bird-like theropod groups and plays an important role in our understanding of avian origins. Although troodontids have been known for over 150 years, few known derived troodontid specimens preserve significant portions of bot...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xing Xu, Qingwei Tan, Corwin Sullivan, Fenglu Han, Dong Xiao
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/832219847cca4664a61fd5c94e8fcb0a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:832219847cca4664a61fd5c94e8fcb0a
record_format	dspace
spelling	oai:doaj.org-article:832219847cca4664a61fd5c94e8fcb0a2021-11-18T06:46:35ZA short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.1932-620310.1371/journal.pone.0022916https://doaj.org/article/832219847cca4664a61fd5c94e8fcb0a2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21915256/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The Troodontidae represents one of the most bird-like theropod groups and plays an important role in our understanding of avian origins. Although troodontids have been known for over 150 years, few known derived troodontid specimens preserve significant portions of both the forelimb and the hindlimb.<h4>Methodology/principal findings</h4>Here, we report a new troodontid taxon, Linhevenator tani gen. et sp. nov., based on a partial, semi-articulated skeleton recovered from the Upper Cretaceous Wulansuhai Formation of Wulatehouqi, Inner Mongolia, China. L. tani has an unusual combination of primitive and derived character states, though our phylogenetic analysis places it in a derived clade within the Troodontidae. As a derived taxon, L. tani has a dromaeosaurid-like pedal digit II, and this species also possesses a humerus that is proportionally much shorter and more robust than those of most other troodontids.<h4>Conclusion/significance</h4>The combination of features present in Linhevenator indicates a complex pattern of character evolution within the Troodontidae. In particular, the discovery of Linhevenator suggests that derived troodontids have independently evolved a highly specialized pedal digit II and have significantly shortened the forelimb over the course of their evolution.Xing XuQingwei TanCorwin SullivanFenglu HanDong XiaoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 9, p e22916 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xing Xu Qingwei Tan Corwin Sullivan Fenglu Han Dong Xiao A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
description	<h4>Background</h4>The Troodontidae represents one of the most bird-like theropod groups and plays an important role in our understanding of avian origins. Although troodontids have been known for over 150 years, few known derived troodontid specimens preserve significant portions of both the forelimb and the hindlimb.<h4>Methodology/principal findings</h4>Here, we report a new troodontid taxon, Linhevenator tani gen. et sp. nov., based on a partial, semi-articulated skeleton recovered from the Upper Cretaceous Wulansuhai Formation of Wulatehouqi, Inner Mongolia, China. L. tani has an unusual combination of primitive and derived character states, though our phylogenetic analysis places it in a derived clade within the Troodontidae. As a derived taxon, L. tani has a dromaeosaurid-like pedal digit II, and this species also possesses a humerus that is proportionally much shorter and more robust than those of most other troodontids.<h4>Conclusion/significance</h4>The combination of features present in Linhevenator indicates a complex pattern of character evolution within the Troodontidae. In particular, the discovery of Linhevenator suggests that derived troodontids have independently evolved a highly specialized pedal digit II and have significantly shortened the forelimb over the course of their evolution.
format	article
author	Xing Xu Qingwei Tan Corwin Sullivan Fenglu Han Dong Xiao
author_facet	Xing Xu Qingwei Tan Corwin Sullivan Fenglu Han Dong Xiao
author_sort	Xing Xu
title	A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
title_short	A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
title_full	A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
title_fullStr	A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
title_full_unstemmed	A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.
title_sort	short-armed troodontid dinosaur from the upper cretaceous of inner mongolia and its implications for troodontid evolution.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/832219847cca4664a61fd5c94e8fcb0a
work_keys_str_mv	AT xingxu ashortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT qingweitan ashortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT corwinsullivan ashortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT fengluhan ashortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT dongxiao ashortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT xingxu shortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT qingweitan shortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT corwinsullivan shortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT fengluhan shortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution AT dongxiao shortarmedtroodontiddinosaurfromtheuppercretaceousofinnermongoliaanditsimplicationsfortroodontidevolution
_version_	1718424426196762624

A short-armed troodontid dinosaur from the Upper Cretaceous of Inner Mongolia and its implications for troodontid evolution.

Ejemplares similares