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Diverse radial symmetry among the Cambrian Fortunian fossil embryos from northern Sichuan and southern Shaanxi provinces, South China.
Xian, Xiao-Feng; Zhang, Hua-Qiao (张华侨); Liu, Yun-Huan; Zhang, Ya-Nan (张亚男)
2019-09-01
Source PublicationPalaeoworld
ISSN1871-174X
Volume28Issue:3Pages:225-233
Abstract

The Cambrian Fortunian fossil embryos exhibit embryonic development of ancient animals and hence have important bearings on evolutionary developmental biology. They have radial symmetry, and may be early representatives of cnidarians. Here we report new material of three dimensionally phosphatized fossil embryos from the Fortunian Kuanchuanpu Formation and coeval strata in northern Sichuan and southern Shaanxi provinces, South China. The new material includes previously reported fossil embryos assignable to Pseudooides prima with biradial symmetry or pseudo-hexaradial symmetry, Quadrapyrgites quadratacris with tetraradial symmetry, and Olivooides multisulcatus with pentaradial symmetry. Additionally, we recovered two new types of fossil embryos, i.e., Embryo I with hexaradial symmetry and Embryo II with octaradial symmetry, and they are tentatively suggested to represent new cnidarians. In contrast to the diverse radial symmetry of the Fortunian cnidarians, modern cnidarians exhibit stable tetraradial symmetry in medusozoans, biradial symmetry in anthozoans, and bilateral symmetry in siphonophores (Hydrozoa). The current study supports the view that the tetraradial symmetry of modern medusozoans is a surviving remnant of their Fortunian relatives. (C) 2018 Elsevier Ireland Ltd Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. Published by Elsevier B.V. All rights reserved.

Language英语
WOS Research AreaAnatomy & Morphology ; Zoology
WOS SubjectANATOMY MORPHOLOGY ; ZOOLOGY
WOS IDWOS:ZOOR15512087315
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/29086
Collection中国科学院南京地质古生物研究所
AffiliationChinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing, Jiangsu, 210008, China
Recommended Citation
GB/T 7714
Xian, Xiao-Feng,Zhang, Hua-Qiao ,Liu, Yun-Huan,et al. Diverse radial symmetry among the Cambrian Fortunian fossil embryos from northern Sichuan and southern Shaanxi provinces, South China.[J]. Palaeoworld,2019,28(3):225-233.
APA Xian, Xiao-Feng,Zhang, Hua-Qiao ,Liu, Yun-Huan,&Zhang, Ya-Nan .(2019).Diverse radial symmetry among the Cambrian Fortunian fossil embryos from northern Sichuan and southern Shaanxi provinces, South China..Palaeoworld,28(3),225-233.
MLA Xian, Xiao-Feng,et al."Diverse radial symmetry among the Cambrian Fortunian fossil embryos from northern Sichuan and southern Shaanxi provinces, South China.".Palaeoworld 28.3(2019):225-233.
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