Ñacari L A, Sepulveda F A, Escribano R, Oliva M E
Instituto Ciencias Naturales Alexander von Humboldt,Universidad de Antofagasta,Chile,PO Box 170,Antofagasta,Chile.
Instituto Milenio de Oceanografía,Universidad de Concepción,Chile.
J Helminthol. 2018 Mar;92(2):223-227. doi: 10.1017/S0022149X17000220. Epub 2017 Mar 21.
Little is known about the diversity of parasites of the deep-sea fish of the world's oceans. Here, a new species of monogenean parasite of the deep-sea skate Gurgesiella furvescens is described. Specimens of parasites were obtained from the skin of two specimens of the dusky finless skate, G. furvescens (Rajidae), in the vicinity of Valparaiso (33°S, 72°W), central Chile, from midwater trawl fishing at depths of 350-450 m. Both morphological and molecular analyses were conducted to provide a full description of the new species, named Acanthocotyle gurgesiella. For the molecular analyses, nuclear large subunit (LSU) rDNA and the mitochondrial gene cytochrome c oxidase 1 (COI) were used. From the morphological analysis and a comparison with the known species of the genus, A. gurgesiella can be identified by a combination of morphological characteristics, including the number of testes, number of radial rows of sclerites in the pseudohaptor, aperture of the genital pore and shape of the vitelline follicles. The results from the DNA analysis indicated that A. gurgesiella has a genetic divergence of 3.2-3.7% (LSU rDNA gene) from A. urolophi, the only congener species for which molecular data are available.
人们对世界各大洋深海鱼类寄生虫的多样性知之甚少。在此，描述了一种深海鳐鱼古尔盖斯氏鳐（Gurgesiella furvescens）的单殖吸虫新物种。寄生虫标本采自智利中部瓦尔帕莱索（33°S，72°W）附近的两尾暗色无鳍鳐（G. furvescens，鳐科）的皮肤，这些标本是在350 - 450米深度的中层拖网捕捞中获得的。进行了形态学和分子分析，以全面描述这个名为棘盘吸虫古尔盖斯氏种（Acanthocotyle gurgesiella）的新物种。对于分子分析，使用了核大亚基（LSU）rDNA和线粒体基因细胞色素c氧化酶1（COI）。通过形态学分析以及与该属已知物种的比较，棘盘吸虫古尔盖斯氏种可通过多种形态特征组合来鉴定，包括睾丸数量、假吸盘上辐状几丁质片的排数、生殖孔开口以及卵黄滤泡的形状。DNA分析结果表明，棘盘吸虫古尔盖斯氏种与仅有的可获取分子数据的同属物种——尾鳐棘盘吸虫（A. urolophi）的遗传差异为3.2 - 3.7%（LSU rDNA基因）。
