| 八臂仙母虫(Eoandromeda octobrachiata)新材料及其意义 |
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| 引用本文： | 唐烽,Stefan Bengtson,尹崇玉,高林志.八臂仙母虫(Eoandromeda octobrachiata)新材料及其意义[J].地球学报,2011,32(6):641-651. |
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| 作者姓名： | 唐烽 Stefan Bengtson 尹崇玉 高林志 |
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| 作者单位： | 中国地质科学院地质研究所；中国地质科学院地层学与古生物学重点实验室;Department of Palaeozoology, Swedish Museum of Natural History;中国地质科学院地质研究所；中国地质科学院地层学与古生物学重点实验室;中国地质科学院地质研究所；中国地质科学院地层学与古生物学重点实验室 |
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| 基金项目： | 国家自然科学基金(编号: 41072005, 41172002, 41162003)；中国科学院现代地层学和古生物学国家重点实验室(编号: 103104)；中国地质调查局(编号: 1212010611802-3, 1212011120140-1) |
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| 摘 要： | 在中国贵州江口地区陡山沱组新发现的化石材料表明,伊迪卡拉/震旦纪(Ediacaran/Sinian)的宏体化石——八臂仙母虫Eoandromeda octobrachiata的原始生活状态可能为一个较高的圆锥形生命体,具有沿着侧面锥状螺旋排列的八条旋臂.旋臂表面保存有与栉水母动物的栉板可能同源的横向有机质条带,规则排列...
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| 关 键 词： | 陡山沱组 八臂仙母虫 伊迪卡拉生物群 栉水母类 后生动物起源 |
New Data of Eoandromeda Octobrachiata and Their Indications |
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| TANG Feng,Stefan Bengtson,YIN Chong-yu and GAO Lin-zhi.New Data of Eoandromeda Octobrachiata and Their Indications[J].Acta Geoscientia Sinica,2011,32(6):641-651. |
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| Authors: | TANG Feng Stefan Bengtson YIN Chong-yu and GAO Lin-zhi |
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| Institution: | TANG Feng 1,2),Stefan Bengtson 3),YIN Chong-yu 1,GAO Lin-zhi 1,2) 1)Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,2)Key Laboratory of Stratigraphy and Paleontology,3)Department of Palaeozoology,Swedish Museum of Natural History,Box 50007,SE-104 05 Stockholm,Sweden |
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| Abstract: | Recent discoveries in South China show that the Ediacaran Doushantuo macrofossil Eoandromeda octobrachiata had a high conical body with eight arms in helicospiral arrangement along the flanks. The arms carried transverse bands supposed to be homologous to ctenophore ctenes (comb plates). Eoandromeda is interpreted as an early stem-group ctenophore, characterized by the synapomorphies ctenes, comb rows, and octoradial symmetry, but without crown-group synapomorphies such as tentacles, statoliths, polar fields, and biradial symmetry. Some exceptionally preserved fossils still have distinct central ring concatenated with eight comb-row-type arms. The authors infer that this derived apicalorgan-like or mouthlip-like structure as in crown coelenterata might be related to the development of neural or sensory system and the ability of locomotion or prey, and that the octoradial taxon probably had a pelagic mode of life. The early appearance in the fossil record of octoradial ctenophores is most consistent with the Planulozoa hypothesis (Ctenophora is the sister group of Cnidaria+Bilateria) of metazoan phylogeny. |
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| Keywords: | Doushantuo Eoandromeda octobrachiata Ediacaran biota ctenophore metazoan phylogeny |
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