Eoandromeda Octobrachiata and the Evolution of Early Animals
Eoandromeda Octobrachiata and the Evolution of Early Animals
复制标题
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Feng
中科院分区：
文献类型：
--
作者：
T. Feng
埃迪卡拉纪八臂化石EoandromedaBrachiata的最新记录，保存在中国南部和澳大利亚的对比埋藏窗中，导致其被解释为早期的栉水母这些早期的宏体化石记录不仅将震旦纪陡山沱组与澳大利亚经典埃迪卡拉生物群的相关地层联系起来，而且，新的发现将重新排列动物树中最早的分支。诊断特征（即：链齿/梳板、梳排、管状臂、中心环和螺旋八径向对称等）认为始仙女座菌属于该分支的茎谱系，该分支包括现代海洋生物梳水母。最近的古生物学研究与最近发表的分子系统基因组假说一致，推进了后生动物起源和早期进化的研究，有助于解决早期动物进化之谜。通过使用新的化石证据。
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.