Molecular phylogeny of the order Euryalida (Echinodermata : Ophiuroidea), based on mitochondrial and nuclear genes
Molecular phylogeny of the order Euryalida (Echinodermata : Ophiuroidea), based on mitochondrial and nuclear genes
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基于线粒体和核基因的Euryalida目（棘皮动物门：Ophiuroidea）的分子系统发育
DOI：
10.1016/j.ympev.2011.07.003
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发表时间：
2011
影响因子：
4.1
通讯作者：
Toshihiko Fujita
中科院分区：
文献类型：
--
作者：
Masanori Okanishi;Tim O'Hara;Toshihiko Fujita
作为蛇类总科（Echinodermata）的两个目之一，广足目（Euryalida）现有的分类学存在着不确定性，其特征是从属到科的分类等级划分存在争议。他们的生育史至今没有得到详细的研究。我们调查了一个数据集的序列从线粒体基因（16S rRNA）和两个核基因（18S rRNA和28S rRNA）的49个euryalid的蛇尾目和四个外群种的Ophiurida。支持的单系的订单Euryalida是单系的Asteronychidae，柳珊瑚科和Asterochematidae +Euryalidae支。然而，目前被称为Asterochematidae的组相对于Euryalidae是并系的。Asterochematidae +Euryalidae的分支，我们认为是一个扩大Euryalidae，包含三个自然群体：Asterochematinae（Asterochemma和Ophiocreas），一个新的亚科Astrocharinae（Astrocharis）和Euryalinae与其余属。这些亚科可以通过内部听小骨形态来区分。
The existing taxonomy of Euryalida, one of the two orders of the Ophiuroidea (Echinodermata), is uncertain and characterized by controversial delimitation of taxonomic ranks from genus to family-level. Their phylogeny was not studied in detail until now. We investigated a dataset of sequence from a mitochondrial gene (16S rRNA) and two nucleic genes (18S rRNA and 28S rRNA) for 49 euryalid ophiuroids and four outgroup species from the order Ophiurida. The monophyly of the order Euryalida was supported as was the monophyly of Asteronychidae, Gorgonocephalidae and an Asteroschematidae+Euryalidae clade. However, the group currently known as the Asteroschematidae was paraphyletic with respect to the Euryalidae. The Asteroschematidae+Euryalidae clade, which we recognise as an enlarged Euryalidae, contains three natural groups: the Asteroschematinae (Asteroschema and Ophiocreas), a new subfamily Astrocharinae (Astrocharis) and the Euryalinae with remaining genera. These subfamilies can be distinguished by internal ossicle morphology.