Early Cambrian animal diapause embryos revealed by X-ray tomography | |
Yin, Zongjun (殷宗军)1,2; Zhao, Duoduo (赵多多)1; Pan, Bing (潘兵)1; Zhao, Fangchen (赵方臣)1,2; Zeng, Han (曾晗)1; Li, Guoxiang (李国祥)1,2; Bottjer, David J.3; Zhu, Maoyan (朱茂炎)1,2,4 | |
刊名 | GEOLOGY |
2018-05-01 | |
卷号 | 46期号:5页码:387-390 |
ISSN号 | 0091-7613 |
DOI | 10.1130/G40081.1 |
英文摘要 | Discoveries of animal embryos have profoundly improved our understanding of the early evolution of animal development. However, the fossil record of early animal embryos is extremely sparse. Here we present some three-dimensionally (3-D) phosphatized Archaeooides from the basal Cambrian in southern Shaanxi Province, China. The 3-D reconstructions of a number of specimens, aided by high-resolution X-ray tomography, demonstrate that these soft-bodied fossil organisms have a thick cyst characterized by pustule-like ornaments and vesicular structures. Furthermore, a multicellular inner body undergoing palintomic cell division is enclosed by the cyst. The suite of characters, including submillimeter to millimeter scale, a palintomic pattern of cell division, and a complex cyst wall microstructure, corroborate the hypothesis that Archaeooides fossils represent the embryonic remains of animals. More specifically, the structure of the cyst wall bears close comparison to the resting cysts of living invertebrates, allowing us to interpret Archaeooides as a diapause embryonic stage adapted to the temporally and spatially heterogeneous redox conditions that extended from the Ediacaran to the early Cambrian. The global distribution of Archaeooides indicates that these conditions were geographically widespread. Ultimately, Archaeooides provides evidence of the early evolution of this metazoan life history strategy as an adaptation to adverse environmental conditions. Its widespread occurrence in both conventional and exceptional taphonomic windows provides the potential for reconstructing its embryology and, by inference, the developmental evolution of early animals and their body plans. |
资助项目 | Chinese Academy of Sciences (CAS)[XDB18000000] ; Chinese Academy of Sciences (CAS)[10010101] ; National Natural Science Foundation of China, Youth Innovation Promotion Association of the CAS |
WOS关键词 | Resting Eggs ; China ; Identification ; Branchiopoda ; Microfossils ; Anostraca ; Fossils ; Nuclei ; Wengan ; Middle |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | GEOLOGICAL SOC AMER, INC |
WOS记录号 | WOS:000431359800004 |
资助机构 | Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China, Youth Innovation Promotion Association of the CAS |
内容类型 | 期刊论文 |
源URL | [http://ir.nigpas.ac.cn/handle/332004/18711] |
专题 | 中国科学院南京地质古生物研究所 南京地质古生物研究所_其他 |
通讯作者 | Yin, Zongjun (殷宗军) |
作者单位 | 1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA 4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Yin, Zongjun ,Zhao, Duoduo ,Pan, Bing ,et al. Early Cambrian animal diapause embryos revealed by X-ray tomography[J]. GEOLOGY,2018,46(5):387-390. |
APA | Yin, Zongjun .,Zhao, Duoduo .,Pan, Bing .,Zhao, Fangchen .,Zeng, Han .,...&Zhu, Maoyan .(2018).Early Cambrian animal diapause embryos revealed by X-ray tomography.GEOLOGY,46(5),387-390. |
MLA | Yin, Zongjun ,et al."Early Cambrian animal diapause embryos revealed by X-ray tomography".GEOLOGY 46.5(2018):387-390. |
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