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首页> 外文期刊>Zoological Science >Milnesium (Tardigrada: Apochela) in Japan: The First Confirmed Record of Milnesium tardigradum s.s. and Description of Milnesium pacificum sp. nov
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Milnesium (Tardigrada: Apochela) in Japan: The First Confirmed Record of Milnesium tardigradum s.s. and Description of Milnesium pacificum sp. nov

机译：Milnesium（Tardigrada：Apochela）在日本：Milnesium Tardigradum S.S的第一个确认的记录。 米恩尼斯普里平SP的描述。 11月

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摘要

Presently, more than 40 species of the genus Milnesium Doyere, 1840 (Tardigrada: Eutardigrada: Apochela: Milnesiidae) have been described. In Japan, however, almost all records of milnesiid tardigrades should be re-examined with the current criteria on the taxonomy of this genus, except for one species, the recently described Milnesium inceptum Morek, Suzuki, Schill, Georgiev, Yankova, Marley, and Michalczyk, 2019. In this study, we found two species, Milnesium pacificum sp. nov. and Milnesium tardigradum Doyere, 1840, from three southern islands and two cold regions in Japan, respectively. Milnesium pacificum sp. nov., having dorsal sculpturing, exhibits an early positive change in claw configuration. On the other hand, M. tardigradum s.s. from Japan has an early negative claw configuration change, as has been reported in a recent study on the neotype population of this species. We performed DNA barcoding for both species, which indicated that M. pacificum sp. nov. has a close affinity with an undescribed Milnesium species collected from Brazil, and that M. tardigradum from Japan represents the recently described subclade that contains specimens from Poland, Hungary, and Russia. The chromosome numbers were 2n = 14 in M. pacificum sp. nov. and 2n = 10 in M. tardigradum. We detected at least three species of the genus Milnesium present in Japan. Our results advance the investigation of the relationship between phylogenetic position and characteristic morphology as well as expand the known geographic range of M. tardigradum.
机译：目前，超过40种Milnesium Doyere，1840年（Tardigrada：Eutardigrada：Apochela：Milnesiidae）已经描述。然而，在日本，几乎所有米尔妮尼德T迪拉德斯的记录都应重新检查目前对该属的分类学的标准，除了一个物种，最近描述的Milnesium Inceptum Morek，Suzuki，Schill，Georgiev，Yankova，Marley和Michalczyk，2019年。在这项研究中，我们发现了两个物种，Milnesium Pacificum sp。 11月。和米恩尼·塔加德赫拉姆无人机，1840年，来自三个南部岛屿和日本的两个寒冷地区。 Milnesium pacificum sp。 11月。，具有背部雕刻，展示爪子配置的早期正变化。另一方面，M. Tardigradum S.S.来自日本的早期负面爪配置变化，正如本物种的最近研究群体的最近的研究中。我们对两种物种进行了DNA条形码，这表明M. Pacificum Sp。 11月。与巴西收集的未描述的氏族物种具有密切的亲和力，日本的塔迪拉德姆代表了含有波兰，匈牙利和俄罗斯的标本的亚克士。染色体数为2N = 14，在M. Pacificum sp。 11月。塔迪拉克里拉姆的2N = 10。我们检测到日本中至少有三种米恩尼斯人类。我们的成果推进了系统发育位置与特征形态的关系的调查，扩大了塔迪拉克里拉姆的已知地理范围。

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