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A new alvarezsaurian theropod from the Upper Jurassic Shishugou Formation of western China.
Sci Rep. 2019 08 13; 9(1):11727.SR

Abstract

Alvarezsaurian dinosaurs, a group of bizarre theropods with greatly shortened and modified forelimbs, are known mostly from the Cretaceous of Asia and South America. Here we report a new alvarezsaurian, Shishugounykus inexpectus gen. et sp. nov, based on a specimen recovered from the Middle-Upper Jurassic Shishugou Formation of the Junggar Basin, western China. Together with two other alvarezsaurians from this formation, i.e., Haplocheirus sollers and Aorun zhaoi, these Shishugou forms represent the only known Jurassic alvarezsaurians worldwide. Similar to the two other Shishugou alvarezsaurians, this new alvarezsaurian displays early stages in the development of the highly modified alvarezsaurian forelimb, but it possesses a number of manual features closer to the typical coelurosaurian theropod condition. Combining morphological and histological features, our analysis indicates that the earliest known alvarezsaurians are variable in size and other important morphological features, and in particular display a mosaic distribution of forelimb features.

Authors+Show Affiliations

Key Laboratory for the Evolutionary Systematics of Vertebrates, Institute of Vertebrate, Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, 100044, China. CAS Center of Excellence in Life and Paleoenvironment, Beijing, 100044, China. University of Chinese Academy of Sciences, Beijing, 100044, China.Department of Biological Sciences, George Washington University, Washington, DC, USA.Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa.Key Laboratory for the Evolutionary Systematics of Vertebrates, Institute of Vertebrate, Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, 100044, China. xu.xing@ivpp.ac.cn. CAS Center of Excellence in Life and Paleoenvironment, Beijing, 100044, China. xu.xing@ivpp.ac.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

31409823

Citation

Qin, Zichuan, et al. "A New Alvarezsaurian Theropod From the Upper Jurassic Shishugou Formation of Western China." Scientific Reports, vol. 9, no. 1, 2019, p. 11727.
Qin Z, Clark J, Choiniere J, et al. A new alvarezsaurian theropod from the Upper Jurassic Shishugou Formation of western China. Sci Rep. 2019;9(1):11727.
Qin, Z., Clark, J., Choiniere, J., & Xu, X. (2019). A new alvarezsaurian theropod from the Upper Jurassic Shishugou Formation of western China. Scientific Reports, 9(1), 11727. https://doi.org/10.1038/s41598-019-48148-7
Qin Z, et al. A New Alvarezsaurian Theropod From the Upper Jurassic Shishugou Formation of Western China. Sci Rep. 2019 08 13;9(1):11727. PubMed PMID: 31409823.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A new alvarezsaurian theropod from the Upper Jurassic Shishugou Formation of western China. AU - Qin,Zichuan, AU - Clark,James, AU - Choiniere,Jonah, AU - Xu,Xing, Y1 - 2019/08/13/ PY - 2018/11/23/received PY - 2019/07/17/accepted PY - 2019/8/15/entrez PY - 2019/8/15/pubmed PY - 2020/10/27/medline SP - 11727 EP - 11727 JF - Scientific reports JO - Sci Rep VL - 9 IS - 1 N2 - Alvarezsaurian dinosaurs, a group of bizarre theropods with greatly shortened and modified forelimbs, are known mostly from the Cretaceous of Asia and South America. Here we report a new alvarezsaurian, Shishugounykus inexpectus gen. et sp. nov, based on a specimen recovered from the Middle-Upper Jurassic Shishugou Formation of the Junggar Basin, western China. Together with two other alvarezsaurians from this formation, i.e., Haplocheirus sollers and Aorun zhaoi, these Shishugou forms represent the only known Jurassic alvarezsaurians worldwide. Similar to the two other Shishugou alvarezsaurians, this new alvarezsaurian displays early stages in the development of the highly modified alvarezsaurian forelimb, but it possesses a number of manual features closer to the typical coelurosaurian theropod condition. Combining morphological and histological features, our analysis indicates that the earliest known alvarezsaurians are variable in size and other important morphological features, and in particular display a mosaic distribution of forelimb features. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/31409823/A_new_alvarezsaurian_theropod_from_the_Upper_Jurassic_Shishugou_Formation_of_western_China_ DB - PRIME DP - Unbound Medicine ER -