The brain of the Remipedia (Crustacea) and an alternative hypothesis on their phylogenetic relationships
The brain of the Remipedia (Crustacea) and an alternative hypothesis on their phylogenetic relationships
复制标题
DOI：
10.1073/pnas.0306212101
复制
发表时间：
2004-03-16
影响因子：
11.1
通讯作者：
Wägele, JW
中科院分区：
文献类型：
--
作者：
Fanenbruck, M;Harzsch, S;Wägele, JW
Remipedia是一种罕见的古老的有颚节肢动物，栖息在几乎无法进入的水下洞穴系统中。它们的系统发育位置仍然是个谜，也是极具争议的辩论主题。为了对这一讨论提供论据，我们分析了Godzilliognomus frondosus Yager，1989（Remipedia，Godzilliidae）的大脑，并提供了详细的三维重建解剖。这一重建得到了令人惊讶的发现，与其他甲壳类动物如鳃足类和颚足类的代表相比，G。frondosus是高度组织化和分化良好的。只有“高等”甲壳类动物（软甲纲）和六足纲动物的大脑才能在复杂性上与之相匹配。一个系统发育分析仅限于大脑解剖整个下颌强烈矛盾的流行假设，即Remipedia是一个基础的，祖先的甲壳类动物组，而是主张在remipecle-malacostracan-hexapod分支和最有可能的姐妹组关系Remipedia和Malacostraca。
Remipedia are rare and ancient mandibulate arthropods inhabiting almost inaccessible submerged cave systems. Their phylogenetic position is still enigmatic and the subject of extremely controversial debates. To contribute arguments to this discussion, we analyzed the brain of Godzilliognomus frondosus Yager, 1989 (Remipedia, Godzilliidae) and provide a detailed 3D reconstruction of its anatomy. This reconstruction yielded the surprising finding that in comparison with the brain of other crustaceans such as representatives of the Branchiopoda and Maxillopoda the brain of G. frondosus is highly organized and well differentiated. It is matched in complexity only by the brain of "higher" crustaceans (Malacostraca) and Hexapoda. A phylogenetic analysis limited to brain anatomy across the Mandibulata strongly contradicts the prevailing hypothesis that the Remipedia are a basal, ancestral crustacean group but instead argues in favor of a remipecle-malacostracan-hexapod clade and most likely a sister-group relationship of Remipedia and Malacostraca.