三肠亚目(扁形动物门：涡虫纲：序列目)涡虫系统发育研究进展  

Survey of Tricladida(Platyhelminthes: Turbellaria: Seriata) Phylogeny

作　　者：张合彩[1] 陈广文[1] 孙健[1] 刘德增[2] 

机构地区：[1]河南师范大学生命科学学院,河南新乡453007 [2]黑龙江省科学院自然资源研究所,哈尔滨150031

出　　处：《河南师范大学学报（自然科学版）》2009年第2期172-176,共5页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(30670247,30170119);教育部高等学校博士点基金(200804760003);河南省杰出青年科学基金(0312001100);河南省高等学校创新人才培养工程基金(豫教高[2005]126号);河南师范大学博士科研启动基金(0713)

摘　　要：比较分析了基于形态特征和分子序列数据的三肠亚目涡虫的系统发育关系,总结出现今大家公认的该亚目的系统发生关系:Tricladida是一个亚目级阶元,即三肠亚目,隶属于扁形动物门、涡虫纲、序列目.该亚目下分4个次目:海栖次目、陆栖次目、沼栖次目和穴居次目,其中海栖次目是一个单系,为亚目内较原始的类群;沼栖次目是一个并系,其内的三角涡虫科和陆栖次目有最近共同祖先;陆栖次目为单系起源.三肠亚目涡虫的演化路线是由海生到淡水再到陆生,之后又有逆转现象,即个别类群(如Spathula、Romankenkius)又返回淡水生活.文中还对未来该亚目系统发育研究的焦点进行了展望和预测.Tricladida is an important group of planarians in Turbellaria, and many researches are focoused on it. In view of their biological importance in so many fields, a robust phylogenetic scheme is required both for taxonomic and comparative purposes. This paper has reviewed the history of Tricladida phylogeny, and compared with some representative results based on morphological characters and molecular sequence data, respectively. The consensus is reached, namely, Tricladida is a rank of suborder and there are four infraorders within it： Paludicola, Maricola, Terricola, and Cavernicola. Among them, Maricola is a monophylum, and Paludicola is a paraphyletic group because its Dugesiidae has the nearest common ancestor with Terricola. Terricola has a monophyletic origin and is followed by a likely return of some species to freshwater habitats. Furthermore, the emphasis of phylogenetic study on this suborder in the future is also expected.

关 键 词：三肠亚目 涡虫 系统发育 研究进展 

分 类 号：Q959[生物学—动物学]