Zawierucha Krzysztof, Kolicka Małgorzata, Kaczmarek Łukasz
Department of Animal Taxonomy and Ecology, Institute of Environmental Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań, Poland.
Zootaxa. 2016 Nov 24;4196(4):zootaxa.4196.4.2. doi: 10.11646/zootaxa.4196.4.2.
Tardigrada is phylum of micrometazoans widely distributed throughout the world, because of old descriptions and insufficient morphometric data, many species currently need revision and re-description. Tenuibiotus voronkovi (Tumanov, 2007) is tardigrade previously only recorded from the Svalbard archipelago. This species' original description was based on two individuals with destroyed claws on the fourth pair of legs and a lack of complete morphometric data for buccal tube and claws. In this paper, we present a re-description of T. voronkovi, supplementing the original description using the original paratype and additional material from Svalbard: Spitsbergen, Nordaustlandet and Edgeøya. This species is characterised by two macroplacoids and a microplacoid, claws of Tenuibiotus type, dentate lunules under claw IV, and faint granulation on legs I-III and strong granulation on the legs IV. We include a new morphological description with microphotographs, morphometric, and molecular data (including: mitochondrial cytochrome c oxidase subunit I (COI), internal transcribed spacers (ITS1-5.8S rDNA-ITS2), and nuclear ribosome subunits 28S rRNA and 18S rRNA). These are the first published molecular data for the genus Tenuibiotus Pilato and Lisi, 2011, analysis of which indicated an affiliation of Tenuibiotus to the family Macrobiotidae. We found no differences in body size between individuals from different islands (Nordaustlandet and Edgeøya), but did observe variability in the eggs. After revision of the literature and the published figures, we concluded that Dastych's (1985) report of T. willardi (Pilato, 1976) from Svalbard, was actually T. voronkovi, which has the greater distribution in Svalbard, and other Arctic locations, than previously believed.
缓步动物门是一类微小后生动物，广泛分布于世界各地。由于过去的描述陈旧且形态测量数据不足，目前许多物种需要修订和重新描述。沃氏细熊虫（Tenuibiotus voronkovi）（图马诺夫，2007年）是一种此前仅在斯瓦尔巴群岛有记录的缓步动物。该物种的原始描述基于两只第四对腿爪部受损且口管和爪部缺乏完整形态测量数据的个体。在本文中，我们对沃氏细熊虫进行了重新描述，利用原始副模式标本和来自斯瓦尔巴群岛（斯匹次卑尔根岛、北奥斯特landet岛和埃季岛）的额外材料补充了原始描述。该物种的特征是有两个大齿板和一个小齿板，细熊虫型爪，第四爪下有齿状新月形结构，第一至三对腿上有微弱颗粒，第四对腿上有强烈颗粒。我们提供了带有显微照片、形态测量和分子数据（包括：线粒体细胞色素c氧化酶亚基I（COI）、内转录间隔区（ITS1 - 5.8S rDNA - ITS2）以及核糖体亚基28S rRNA和18S rRNA）的新形态描述。这些是2011年皮拉托和利西的细熊虫属首次发表的分子数据，分析表明细熊虫属隶属于大生熊虫科。我们发现来自不同岛屿（北奥斯特landet岛和埃季岛）的个体在体型上没有差异，但观察到了卵的变异性。在查阅文献和已发表的图后，我们得出结论，达斯蒂奇（1985年）关于斯瓦尔巴群岛的威氏细熊虫（T. willardi）（皮拉托，1976年）的报告实际上是沃氏细熊虫，它在斯瓦尔巴群岛和其他北极地区的分布比之前认为的更广。
