Museum of Comparative Zoology & Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA.
Museum of Comparative Zoology & Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MAZoological Museum, Department of Biology, University of Turku, Turku, Finland.
Mol Biol Evol. 2014 Jun;31(6):1500-13. doi: 10.1093/molbev/msu108. Epub 2014 Mar 26.
Relationships between the five extant orders of centipedes have been considered solved based on morphology. Phylogenies based on samples of up to a few dozen genes have largely been congruent with the morphological tree apart from an alternative placement of one order, the relictual Craterostigmomorpha, consisting of two species in Tasmania and New Zealand. To address this incongruence, novel transcriptomic data were generated to sample all five orders of centipedes and also used as a test case for studying gene-tree incongruence. Maximum likelihood and Bayesian mixture model analyses of a data set composed of 1,934 orthologs with 45% missing data, as well as the 389 orthologs in the least saturated, stationary quartile, retrieve strong support for a sister-group relationship between Craterostigmomorpha and all other pleurostigmophoran centipedes, of which the latter group is newly named Amalpighiata. The Amalpighiata hypothesis, which shows little gene-tree incongruence and is robust to the influence of among-taxon compositional heterogeneity, implies convergent evolution in several morphological and behavioral characters traditionally used in centipede phylogenetics, such as maternal brood care, but accords with patterns of first appearances in the fossil record.
基于形态学，已解决现存的蜈蚣目之间的关系。除了一个例外，即由塔斯马尼亚和新西兰的两个物种组成的化石 Craterostigmomorpha 目，基于多达几十个基因样本的系统发育与形态树在很大程度上是一致的。为了解决这种不一致，生成了新的转录组数据来采样所有五个蜈蚣目，并将其用作研究基因树不一致的测试案例。由具有 45%缺失数据的 1934 个直系同源物组成的数据集的最大似然和贝叶斯混合模型分析，以及在最不饱和、稳定四分位数中的 389 个直系同源物，强烈支持 Craterostigmomorpha 目与所有其他 pleurostigmophoran 蜈蚣目之间的姐妹群关系，后者被重新命名为 Amalpighiata。Amalpighiata 假说显示出很少的基因树不一致，并且不受分类群组成异质性的影响，这意味着在传统上用于蜈蚣系统发育学的几个形态和行为特征中存在趋同进化，例如母体育雏，但与化石记录中的首次出现模式一致。
