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A new scalidophoran animal from the Cambrian Fortunian Stage of South China and its implications for the origin and early evolution of Kinorhyncha
Shao, T. Q.1; Wang, Q.1; Liu, Y. H.1; Qin, J. C.1; Zhang, Y. N.1; Liu, M. J.1; Shao, Y.1; Zhao, J. Y.1; Zhang, H. Q.2,3
2020-10-01
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume349Pages:9
Abstract

Kinorhyncha is a cycloneuralian phylum with about 240 extant species, and it was not until 2015 that the first and only fossil kinorhynch species Eokinorhynchus rarus was reported. Here, we describe a new scalidophoran animal, Zhongpingscolex qinensis gen. a sp. nov., from the Cambrian Fortunian Kuanchuanpu Formation at Zhangjiagou section, southern Shaanxi Province, South China. The holotype and only specimen possesses morphology comparable to that of E. rarus. They both possess heterogeneous trunk annuli, and compared with E. rarus, Z. qinensis gen. a sp. nov. lacks a neck. Phylogenetic analysis resolves Z. qinensis gen. a sp. nov. as the sister group of E. rarus, both constituting stem-lineage derivatives of Kinorhyncha. The evolutionary scenario from the last common ancestor of crown-group Scalidophora to the last common ancestor of total-group Kinorhyncha includes the acquisition of a much shortened body with a relatively low body length to width ratio, heterogeneous trunk annuli, and macroannuli with simple armatures. The spines, large spinose sclerites, and annular rings of rectangular plates are autapomorphic to E. rarus, and segments (zonites) with independent cuticular plates as in crown-group kinorhynchs were evolved later.

KeywordKinorhyncha Scalidophora Cycloneuralia Orsten-type fossils Fortunian Stage South China
DOI10.1016/j.precamres.2020.105616
Indexed BySCI
Language英语
WOS KeywordCYCLONEURALIANS ; PALAEOSCOLECIDS ; ZHANGJIAGOU ; ARTHROPODS ; SHALE
Funding ProjectNational Natural Science Foundation of China[41872014] ; National Natural Science Foundation of China[41572009] ; National Natural Science Foundation of China[41572007] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences[193123] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences[20191104] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2016283] ; Basic Research Plan of Natural Science of Shaanxi Province[2018JM4002] ; Graduate Student Scientific Research Innovation Projects of Chang'an University[2019383] ; Graduate Student Scientific Research Innovation Projects of Chang'an University[2019368]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000589422300016
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Basic Research Plan of Natural Science of Shaanxi Province ; Graduate Student Scientific Research Innovation Projects of Chang'an University
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/37570
Collection中国科学院南京地质古生物研究所
Corresponding AuthorWang, Q.; Liu, Y. H.; Zhang, H. Q.
Affiliation1.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Shao, T. Q.,Wang, Q.,Liu, Y. H.,et al. A new scalidophoran animal from the Cambrian Fortunian Stage of South China and its implications for the origin and early evolution of Kinorhyncha[J]. PRECAMBRIAN RESEARCH,2020,349:9.
APA Shao, T. Q..,Wang, Q..,Liu, Y. H..,Qin, J. C..,Zhang, Y. N..,...&Zhang, H. Q..(2020).A new scalidophoran animal from the Cambrian Fortunian Stage of South China and its implications for the origin and early evolution of Kinorhyncha.PRECAMBRIAN RESEARCH,349,9.
MLA Shao, T. Q.,et al."A new scalidophoran animal from the Cambrian Fortunian Stage of South China and its implications for the origin and early evolution of Kinorhyncha".PRECAMBRIAN RESEARCH 349(2020):9.
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