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Morphology of diverse radiodontan head sclerites from the early Cambrian Chengjiang Lagerstatte, south-west China
Zeng, Han (曾晗)1,2; Zhao, Fangchen (赵方臣)1; Yin, Zongjun (殷宗军)1; Zhu, Maoyan (朱茂炎)1,2
2018
Source PublicationJOURNAL OF SYSTEMATIC PALAEONTOLOGY
ISSN1477-2019
Volume16Issue:1Pages:1-37
Abstract

Recorded in exceptionally preserved Lagerstatten, the radiodontans (including anomalocaridids) are cosmopolitan, soft-bodied, stem-group euarthropods that inhabited Palaeozoic seas. They are notable for their unique morphology, peculiar ecology and basal position in euarthropod evolution. The early Cambrian Chengjiang Lagerstatte has yielded some of the oldest radiodontans, including three unquestionable taxa - Anomalocaris saron Hou etal., 1995, Amplectobelua symbrachiata Hou etal., 1995 and Lyrarapax unguispinus Cong etal., 2014 - based on articulated specimens. However, recent discoveries of the Burgess Shale Hurdia Walcott, 1912 and the Fezouata Aegirocassis benmoulae Van Roy etal., 2015 highlight the presence of another radiodontan group (Hurdiidae) characterized by a tripartite head sclerite complex consisting of one central element and a pair of lateral elements. Here, we describe six morphotypes of possible hurdiid head sclerite elements from the Chengjiang Lagerstatte, some of which are closely associated with other typical radiodontan body parts. These, recognized as central elements, include two new species of the same new genus, Tauricornicaris latizonae gen. et sp. nov. and T. oxygonae gen. et sp. nov., and a former bivalved euarthropod, Zhenghecaris shankouensis Vannier etal., 2006. Another three unnamed sclerite elements are identified as lateral elements. These sclerite elements from Chengjiang provide detailed anatomy, such as mammillary tubercles and soft-tissue reticulate structure, to help understand the morphology and biology of all hurdiid head sclerites. A common single dorsal plate in Anomalocaris saron and Amplectobelua symbrachiata is confirmed. Although the morphologically diverse central and lateral elements of the Hurdiidae and the conserved dorsal plate of the Anomalocarididae + Amplectobeluidae reflect a major distinction in radiodontan body plans, they share a fundamental structure of double layers of cuticle. The Chengjiang specimens not only clarify the morphology and biology of the radiodontan head sclerites in general, but also illuminate the diversity and disparity of radiodontans in their early evolutionary history.http://zoobank.org/urn:lsid:zoobank.org:pub:D0590390-A85A-493A-8529-B2DF64D91169

KeywordRadiodonta Anomalocaridids Arthropods Chengjiang Cambrian Explosion
DOI10.1080/14772019.2016.1263685
Language英语
WOS KeywordGreat-appendage Arthropod ; Burgess Shale ; Anomalocaridid Appendages ; Functional-morphology ; Bivalved Arthropod ; Circulatory-system ; Series 2 ; Evolution ; Origin ; Homology
Funding ProjectNational Basic Research Programme of China[2013CB835006] ; Chinese Academy of Sciences[XDB18030304] ; National Natural Science Foundation of China[41472012] ; China Scholarship Council[201604910753]
WOS Research AreaEvolutionary Biology ; Paleontology
WOS SubjectEvolutionary Biology ; Paleontology
WOS IDWOS:000415718900001
Funding OrganizationNational Basic Research Programme of China ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Scholarship Council
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/18922
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorZhao, Fangchen (赵方臣)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Zeng, Han ,Zhao, Fangchen ,Yin, Zongjun ,et al. Morphology of diverse radiodontan head sclerites from the early Cambrian Chengjiang Lagerstatte, south-west China[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2018,16(1):1-37.
APA Zeng, Han ,Zhao, Fangchen ,Yin, Zongjun ,&Zhu, Maoyan .(2018).Morphology of diverse radiodontan head sclerites from the early Cambrian Chengjiang Lagerstatte, south-west China.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,16(1),1-37.
MLA Zeng, Han ,et al."Morphology of diverse radiodontan head sclerites from the early Cambrian Chengjiang Lagerstatte, south-west China".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 16.1(2018):1-37.
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