Molecular phylogeny of Myriapoda provides insights into evolutionary patterns of the mode in post-embryonic development.
Molecular phylogeny of Myriapoda provides insights into evolutionary patterns of the mode in post-embryonic development.
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DOI：
10.1038/srep04127
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发表时间：
2014-02-18
影响因子：
4.6
通讯作者：
Su ZH
中科院分区：
文献类型：
--
作者：
Miyazawa H;Ueda C;Yahata K;Su ZH
多足纲是节肢纲的一个亚门，包括足纲、双足纲、保足纲和合足纲四个纲。虽然最近的分子证据表明多足类动物是单系的，但对了解多足类动物进化史至关重要的内部系统发育仍未得到解决。本文报道了多足类动物的系统发育分析结果，并对它们的分化时间和祖先状态进行了估计。对4纲17目19只多足动物和11个外群种的3个核蛋白编码基因进行了系统发育分析。结果表明，联门是所有其他多足类动物的姐妹系，其系统发育位置一直存在争议，并且纲内的互序关系与传统分类一致。基于树拓扑的祖先状态估计表明，多足类动物的祖先状态以胚胎后发育的半变形模式为特征，具有相对较少的身体节段和腿。
Myriapoda, a subphylum of Arthropoda, comprises four classes, Chilopoda, Diplopoda, Pauropoda, and Symphyla. While recent molecular evidence has shown that Myriapoda is monophyletic, the internal phylogeny, which is pivotal for understanding the evolutionary history of myriapods, remains unresolved. Here we report the results of phylogenetic analyses and estimations of divergence time and ancestral state of myriapods. Phylogenetic analyses were performed based on three nuclear protein-coding genes determined from 19 myriapods representing the four classes (17 orders) and 11 outgroup species. The results revealed that Symphyla whose phylogenetic position has long been debated is the sister lineage to all other myriapods, and that the interordinal relationships within classes were consistent with traditional classifications. Ancestral state estimation based on the tree topology suggests that myriapods evolved from an ancestral state that was characterized by a hemianamorphic mode of post-embryonic development and had a relatively low number of body segments and legs.
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影响因子：
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作者：
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