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首页> 外文期刊>Journal of Parasitology >Validity of the bear tapeworm Diphyllobothrium ursi (Cestoda: Diphyllobothriidae) based on morphological and molecular markers.
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Validity of the bear tapeworm Diphyllobothrium ursi (Cestoda: Diphyllobothriidae) based on morphological and molecular markers.

机译：基于形态学和分子标记的熊worm虫（Diphyllobothrium ursi）（Cestoda：Diphyllobothriidae）的有效性。

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摘要

The bear tapeworm Diphyllobothrium ursi is described based upon the morphology of adult tapeworms recovered from the brown bear ( Ursus arctos middendorffi) and larval plerocercoids found in sockeye salmon ( Oncorhynchus nerka) from Kodiak Island in Alaska in 1952. However, in 1987 D. ursi was synonymized with Diphyllobothrium dendriticum, and the taxonomic relationship between both species has not subsequently been revised. In this study mitochondrial cytochrome c oxidase subunit 1 gene ( cox1) sequences of holotype and paratype D. ursi specimens that had been preserved in a formalin-acetic acid-alcohol solution since the time the species was initially described approximately 60 yr ago were analyzed. Molecular and phylogenetic analysis of the cox1 sequences revealed that D. ursi is more closely related to D. dendriticum than it is to Diphyllobothrium nihonkaiense and Diphyllobothrium latum. In addition to molecular evidence, differences in the life cycle and ecology of the larval plerocercoids between D. ursi and D. dendriticum also suggest that D. ursi is a distinct species, separate from D. dendriticum and D. nihonkaiense, and also possibly from D. latum.
机译：对熊tape虫Diphyllobothrium ursi的描述是基于从棕熊（Ursus arctos middendorffi）和从阿拉斯加科迪亚克岛的红鲑鲑鱼（Oncorhynchus nerka）中发现的幼体拟除虫卵中提取的成年tape虫的形态。1952年，1987年。被称为树突棘生物（Diphyllobothrium dendriticum），并且两个物种之间的分类关系后来未作修订。在这项研究中，分析了自最初描述该物种以来大约60年以来一直保存在福尔马林-乙酸-酒精溶液中的完整型和副型D. ursi标本的线粒体细胞色素c氧化酶亚基1基因（cox1）序列。对cox1序列的分子和系统发育分析表明，D。ursi与D. dendriticum的关系比与日本Diphyllobothrium nihonkaiense和Diphyllobothrium latum的关系更紧密。除分子证据外，D。ursi和D. d。树之间的幼虫类拟除虫生命周期和生态学方面的差异还表明D. ursi是与D. dendriticum和D. nihonkaiense分开的独特物种，也可能与D. latum。

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