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

Euryalida (Ophiuroidea) 的系统学和系统发育以及臂形态的进化

• 批准号: 22570104
• 负责人: FUJITA Toshihiko
• 金额: $ 2.83万
• 依托单位: National Museum of Nature and Science, Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22570104/
• 关键词: 分子系統; 分類; 多様化; 棘皮動物門; クモヒトデ綱; ツルクモヒトデ目; 腕骨; マイクロCT; 棘皮生物門

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.

利用近2400份标本，对棘皮目蛇科棘皮目的分类和系统发育进行了研究。在北太平洋西部发现了1个新属6个新种，1个初级同属和11个初级同属，共33属112种。基于核18S rRNA、线粒体16S rRNA和COI序列共2917 bp的分子系统发育分析表明，Asteroschematidae属副属。分子系统发育所识别的分支也有明确的分类学特征支持。扫描电镜观察到的听骨形态是一个非常有效和稳定的分类特征。根据分子和形态资料，提出了一个新的系统分类（2超科，5科，3亚科）。对于euryalid蛇类来说，手臂分支的进化不是一次而是多次。

项目成果

Molecular phylogeny of the order Euryalida (Echinodermata : Ophiuroidea), based on mitochondrial and nuclear genes

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
• 发表时间: 2011
• 期刊: Molecular Phylogenetics and Evolution
• 影响因子: 4.1
• 作者: Masanori Okanishi;Tim O'Hara;Toshihiko Fujita
• 通讯作者: Toshihiko Fujita

A new family-level classification of the order Euryalida (Echinodermata: Ophiuoroidea)

Euryalida 目新的科级分类（棘皮动物门：Ophiuoroidea）

• 发表时间: 2012
• 作者: Okanishi;M.;Fujita;T.
• 通讯作者: T.

ツルクモヒトデ目(棘皮動物門:クモヒトデ綱)の系統分類学的研究

蜘蛛目（棘皮动物门：蜘蛛纲）的系统发育研究

• 发表时间: 2011
• 作者: Masanori Okanishi;Toshihiko Fujita;岡西政典・Tim O'Hara・藤田敏彦
• 通讯作者: 岡西政典・Tim O'Hara・藤田敏彦