A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China

doi:10.1080/14772019.2018.1535455

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	A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China
	Wang, Wei 1,2,3,4; Li, Chun1,3 ; Scheyer, Torsten M.4; Zhao, Lijun 5
刊名	JOURNAL OF SYSTEMATIC PALAEONTOLOGY
	2019-09-02
卷号	17 期号:17 页码:1237-1256
关键词	Placodontia Guanling Biota dentition carapace biogeography
ISSN号	1477-2019
DOI	10.1080/14772019.2018.1535455
英文摘要	The Triassic eastern Tethyan faunas have continued to yield numerous specimens of marine reptile taxa in recent years. Nevertheless, compared with other sauropterygian clades, the diversity of placodonts in these faunas is low, and remains of this group are relatively rare in the fossil assemblages. Here, we report a new cyamodontoid specimen (ZMNH M8820) from the early Late Triassic of Guizhou, south-west China. This specimen is a nearly complete skeleton lacking only the forelimbs. It is distinct from other known Chinese placodonts as it features a large skull with remarkably enlarged supratemporal fenestrae and a small and less regularly arranged carapace. Interestingly, this new specimen resembles the European Cyamodus more than any Chinese cyamodontoid genera, particularly when considering the dentition and other cranial morphology. However, it differs from known Cyamodus species in some cranial features (e.g. epipterygoid fully ossified, posttemporal fenestra large, dentition derived) and the absence of a separate pelvic shield. Furthermore, based on an updated data matrix of placodonts, our phylogenetic results support the affinity of this new Chinese specimen with European Cyamodus species, and a new species, Cyamodus orientalis sp. nov., is erected here. This new material represents the first reported Cyamodus specimen in the world that preserves a three-dimensional skull with an associated postcranial skeleton and it extends the distribution of this genus into the early Carnian of the eastern Tethys. The existence of Cyamodus, a nearshore taxon, in south-west China at this time reveals greater similarity and more rapid intercommunication than previously known between western and eastern Tethyan vertebrate faunas, although the palaeobiogeographical origin and migration history of Cyamodontidae - and of other clades of placodont reptiles - are still obscure due to the scarcity of material from the northern and southern margins of the Palaeotethys.http://zoobank.org/urn:lsid:zoobank.org:pub:DE6946AD-B4F4-4FC0-AD2F-C5DB2903876D
资助项目	Strategic Priority Research Programs of Chinese Academy of Sciences[XDB26000000] ; UCAS Joint PhD Training Program[UCAS[2015]37] ; Swiss National Science Foundation[31003A_173173] ; National Natural Science Foundation of China[41772006]
WOS关键词	REPTILIA ; PHYLOGENY ; DIAPSIDA ; GUIZHOU
WOS研究方向	Evolutionary Biology ; Paleontology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000474852800002
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/9987]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Wang, Wei
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 4.Univ Zurich, Palaontol Inst & Museum, Karl Schmid Str 4, CH-8006 Zurich, Switzerland 5.Zhejiang Museum Nat Hist, Hangzhou 310014, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wei,Li, Chun,Scheyer, Torsten M.,et al. A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2019,17(17):1237-1256.
APA	Wang, Wei,Li, Chun,Scheyer, Torsten M.,&Zhao, Lijun.(2019).A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,17(17),1237-1256.
MLA	Wang, Wei,et al."A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 17.17(2019):1237-1256.