| 八臂仙母虫(Eoandromeda octobrachiata)与早期动物演化 |
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| 关键词:Eoandromeda octobrachiata ctenophore evolution early animals |
| 基金项目:国家自然科学基金项目(编号: 41172002; 41162003);中国科学院现代地层学和古生物学国家重点实验室项目(编号: 103104);中国地质调查局专项(编号: 1212011120140-1) |
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| Eoandromeda Octobrachiata and the Evolution of Early Animals |
| Recent records of the eight-armed Ediacaran fossil Eoandromeda octobrachiata, preserved in contrasting taphonomic windows from the southern China and Australia, have led to its interpretation as an early ctenophore (comb jelly). These early macrofossil records have not only presented a link between the Sinian Doushantuo Fomation and the relevant strata of the classic Ediacara biota in Australia, but also extended the appearance date of Ctenophora backwards by approximately thirty millions years. Moreover, newly discoveries would reorder the earliest branches in the animal tree. The diagnostic features (i.e.: ctenes/comb plates, comb rows, tubular arms, central ring and spiral octoradial symmetry, etc.) suggest that Eoandromeda belongs to the stem lineage of the clade that includes modern ocean dwellers known as comb jellies. The recent paleontological study is consistent with a recently published molecular phylogenomic hypothesis. It advances the research of metazoan origin and early evolution, and helps solve the puzzle of early animal evolution by using the new fossil evidence. |
| TANG Feng.2012.Eoandromeda Octobrachiata and the Evolution of Early Animals[J].Acta Geoscientica Sinica,33(5):721-729. |
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