Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).

Beipiaosaurus inexpectus, from the Lower Cretaceous Yixian Formation (Sihetun locality, near Beipiao), Liaoning, China, is a key taxon for understanding the early evolution of therizinosaurians. Since initial publication in 1999, only the cranial elements of this taxon have been described in detail....

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Autores principales:	Chun-Chi Liao, Lindsay E Zanno, Shiying Wang, Xing Xu
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dfc95263651c4afa81701e924245ab5e
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spelling	oai:doaj.org-article:dfc95263651c4afa81701e924245ab5e2021-12-02T20:13:54ZPostcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).1932-620310.1371/journal.pone.0257913https://doaj.org/article/dfc95263651c4afa81701e924245ab5e2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0257913https://doaj.org/toc/1932-6203Beipiaosaurus inexpectus, from the Lower Cretaceous Yixian Formation (Sihetun locality, near Beipiao), Liaoning, China, is a key taxon for understanding the early evolution of therizinosaurians. Since initial publication in 1999, only the cranial elements of this taxon have been described in detail. Here we present a detailed description of the postcranial skeletal anatomy of the holotype specimen of B. inexpectus, including two never before described dorsal vertebrae from the anterior half of the series. Based on these observations, and comparisons with the postcranial skeleton of therizinosaurian taxa named since the most recent diagnosis, we revised the diagnostic features for B. inexpectus adding three new possible autapomorphies (PII-3 shorter than PIII-4, subequal length of the pre- and postacetabular portions of the ilium, and equidimensional pubic peduncle of ilium). Additionally, we also propose three possible synapomorphies for more inclusive taxa (Therizinosauroidea and Therizinosauridae) and discuss implications for evolutionary trends within Therizinosauria. The newly acquired data from the postcranial osteology of the holotype specimen of B. inexpectus sheds light on our understanding of postcranial skeletal evolution and identification of therizinosaurians.Chun-Chi LiaoLindsay E ZannoShiying WangXing XuPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0257913 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chun-Chi Liao Lindsay E Zanno Shiying Wang Xing Xu Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
description	Beipiaosaurus inexpectus, from the Lower Cretaceous Yixian Formation (Sihetun locality, near Beipiao), Liaoning, China, is a key taxon for understanding the early evolution of therizinosaurians. Since initial publication in 1999, only the cranial elements of this taxon have been described in detail. Here we present a detailed description of the postcranial skeletal anatomy of the holotype specimen of B. inexpectus, including two never before described dorsal vertebrae from the anterior half of the series. Based on these observations, and comparisons with the postcranial skeleton of therizinosaurian taxa named since the most recent diagnosis, we revised the diagnostic features for B. inexpectus adding three new possible autapomorphies (PII-3 shorter than PIII-4, subequal length of the pre- and postacetabular portions of the ilium, and equidimensional pubic peduncle of ilium). Additionally, we also propose three possible synapomorphies for more inclusive taxa (Therizinosauroidea and Therizinosauridae) and discuss implications for evolutionary trends within Therizinosauria. The newly acquired data from the postcranial osteology of the holotype specimen of B. inexpectus sheds light on our understanding of postcranial skeletal evolution and identification of therizinosaurians.
format	article
author	Chun-Chi Liao Lindsay E Zanno Shiying Wang Xing Xu
author_facet	Chun-Chi Liao Lindsay E Zanno Shiying Wang Xing Xu
author_sort	Chun-Chi Liao
title	Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
title_short	Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
title_full	Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
title_fullStr	Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
title_full_unstemmed	Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).
title_sort	postcranial osteology of beipiaosaurus inexpectus (theropoda: therizinosauria).
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/dfc95263651c4afa81701e924245ab5e
work_keys_str_mv	AT chunchiliao postcranialosteologyofbeipiaosaurusinexpectustheropodatherizinosauria AT lindsayezanno postcranialosteologyofbeipiaosaurusinexpectustheropodatherizinosauria AT shiyingwang postcranialosteologyofbeipiaosaurusinexpectustheropodatherizinosauria AT xingxu postcranialosteologyofbeipiaosaurusinexpectustheropodatherizinosauria
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Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).

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