The evolutionary relationships of the earliest known cycloneuralians and a new record from the Cambrian Fortunian of South China | |
Zhang, Hua-Qiao(张华侨)2 | |
刊名 | PALAEOWORLD |
2022-09-01 | |
卷号 | 31期号:3页码:389-401 |
关键词 | cycloneuralians the earliest known ecdysozoans Orsten-type fossils Cambrian Fortunian South China |
ISSN号 | 1871-174X |
DOI | 10.1016/j.palwor.2021.09.003 |
英文摘要 | The Cambrian Fortunian Kuanchuanpu Formation and coeval strata in southern Shaanxi and northern Sichuan Provinces contain phosphatic carbonate that has yielded unambiguous body fossils of cycloneuralians. To date, six genera and species as well as nine inde-terminate forms have been reported, and they provided information on the earliest known cycloneuralians and ecdysozoans. Among them, an indeterminate form is critical for understanding the evolution of the Fortunian cycloneuralians, and here I formally name it as Xinliscolex intermedius n. gen. n. sp. It has a series of at least seven longitudinal spinose sclerites on the dorsal side, and sensory struc-tures such as pores and tubules distributed randomly among the annuli. The trunk end has two pairs of bilaterally arranged caudal spines. Micro-CT analysis reveals the preservation of a pharynx with inverted introvert with internally hollow scalids, an esophagus, midgut and hindgut, and a terminal anus. The digestive tract of Xinliscolex intermedius resembles that of modern priapulids, implying that the earliest known cycloneuralians have evolved a relatively derived digestive system, and this lays a foundation for their further diversification and evolution. (C) 2021 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved. |
资助项目 | National Natural Science Foundation of China[42172020] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[20191104] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] |
WOS关键词 | PALAEOSCOLECID WORMS ; FOSSIL EMBRYOS ; LAGERSTATTE ; ZHANGJIAGOU ; ECDYSOZOA ; MARKUELIA ; ANCESTORS ; SYMMETRY ; ANATOMY ; MIDDLE |
WOS研究方向 | Paleontology |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000842979600002 |
资助机构 | National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.nigpas.ac.cn/handle/332004/41151] |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Zhang, Hua-Qiao(张华侨) |
作者单位 | 1.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Hua-Qiao. The evolutionary relationships of the earliest known cycloneuralians and a new record from the Cambrian Fortunian of South China[J]. PALAEOWORLD,2022,31(3):389-401. |
APA | Zhang, Hua-Qiao.(2022).The evolutionary relationships of the earliest known cycloneuralians and a new record from the Cambrian Fortunian of South China.PALAEOWORLD,31(3),389-401. |
MLA | Zhang, Hua-Qiao."The evolutionary relationships of the earliest known cycloneuralians and a new record from the Cambrian Fortunian of South China".PALAEOWORLD 31.3(2022):389-401. |
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