基于ITS-2 rDNA序列的双叶槽绦虫（绦虫纲：假叶目）系统发育研究
The phylogeny of diphyllobothriid tapeworms (Cestoda: Pseudophyllidea) based on ITS-2 rDNA sequences.
作者信息
Logan Flora J, Horák A, Stefka J, Aydogdu A, Scholz T
机构信息
Institute of Parasitology, Academy of Sciences of the Czech Republic and Faculty of Biological Sciences, University of South Bohemia, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
出版信息
Parasitol Res. 2004 Sep;94(1):10-5. doi: 10.1007/s00436-004-1164-y. Epub 2004 Jul 27.
Phylogenetic analysis of sequences of the ITS-2 rRNA genes of 20 samples of pseudophyllidean cestodes of the family Diphyllobothriidae (Ligula, Digramma, Diphyllobothrium, and Schistocephalus) from different hosts and geographical regions revealed that: (1) the inclusion of ligulids (previously family Ligulidae) to the Diphyllobothriidae is correct; (2) Schistocephalus appears as the most basal taxon of the Diphyllobothriidae, well separated from Ligula and Digramma, thus supporting the validity of Schistocephalinae Dubinina, 1962; (3) Digramma belonged with samples of Ligula, thus suggesting its invalidity as a genus; and (4) isolates of Ligula, presumably belonging to Ligula intestinalis, are paraphyletic, indicating that this species may represent a complex of separate taxa. Our results indicate the necessity for a taxonomic revision of the family Diphyllobothriidae.
对来自不同宿主和地理区域的20个双叶槽绦虫科（裂头绦虫属、双线绦虫属、双叶槽绦虫属和裂头蚴属）假叶目绦虫样本的ITS-2 rRNA基因序列进行系统发育分析，结果表明：（1）将裂头绦虫类（以前的裂头绦虫科）归入双叶槽绦虫科是正确的；（2）裂头蚴属是双叶槽绦虫科最基部的分类单元，与裂头绦虫属和双线绦虫属明显分开，从而支持了1962年杜比宁提出的裂头蚴亚科的有效性；（3）双线绦虫属与裂头绦虫属的样本归为一类，因此表明其作为一个属是无效的；（4）裂头绦虫属的分离株，可能属于肠裂头绦虫，是并系的，这表明该物种可能代表一个独立分类单元的复合体。我们的结果表明有必要对双叶槽绦虫科进行分类修订。
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