Systematics and phylogeny of Euryalida (Ophiuroidea) and evolution of the morphology of arms

根据DNA和形态学研究了2400余件广皮目（棘皮动物门，蛇尾总科）标本的分类和系统发育。记述了1个新属、6个新种、1个次异名属、11个次异名种，共记录了北太平洋西部的33属112种。基于核18SrRNA、线粒体16SrRNA和COI共2917 bp的分子遗传学分析表明，星纹科为并系系统。分子系统发育学所确认的分支也得到了明确的分类学特征的支持。扫描电镜观察的听小骨形态是一种有效而稳定的分类学特征。根据分子生物学和形态学资料，提出了广翅目新的系统分类（2个总科，5个科，3个亚科）。臂分支不是一次，而是在许多倍的广形蛇尾。

Taxonomy and phylogeny of the order Euryalida (Echinodermata, Ophiuroidea) were studied based on DNA and morphology using about 2400 specimens. One new genus and 6 new species, 1 junior synonym genus, and 11 junior synonym species were described, and a total of 112 species of 33 genera were distributed in western North Pacific. Molecular phylogeny analysis of 83 species based on a total of 2917 bp of nuclear 18S rRNA, and mitochondrial 16S rRNA and COI indicated that the family Asteroschematidae are paraphyletic. Clades recognized by molecular phylogeny were also supported by clear taxonomical features. The morphology of ossicles observed by scanning electron microscopy was a very effective and stable taxonomical character. A new systematics (2 superfamilies, 5 families, 3 subfamilies) of the order Euryalida was proposed based on molecular and morphological data. Arm branching was evolved not once but in many times for euryalid ophiuroids.