Atopkin D M, Besprozvannykh V V, Ngo H D, Van Ha N, Van Tang N, Ermolenko A V, Beloded A Y
Institute of Biology and Soil Sciences,Far Eastern Branch of Russian Academy of Sciences,Vladivostok,Russia.
Institute of Ecology and Biodiversity,Vietnamese Academy of Sciences and Technology,Hanoi,Vietnam.
J Helminthol. 2017 May;91(3):346-355. doi: 10.1017/S0022149X16000389. Epub 2016 Jun 22.
Adults of Lasiotocus lizae Liu, 2002 (Monorchiidae) were found in the mullet Liza longimanus (Günther) from Tonkin Bay, near Cat Ba Island, Vietnam. In this region, flukes belonging to the genus Paucivitellosus (Bivesiculudae) were found in Liza subviridis (Valenciennes), Liza engeli (Bleeker) and Valamugil seheli (Forskåi). Results of investigations showed that morphological features of L. lizae (like L. glebulentus Overstreet, 1971) do not meet the criteria of the genus Lasiotocus. In addition, L. lizae is highly differentiated from other species of Lasiotocus from which molecular data were obtained, including L. arrhichostoma Searle, Cutmore et Cribb, 2014 and L. typicum (Nicoll, 1912). Phylogenetic analyses revealed that L. lizae differs considerably from other species of the genus Lasiotocus presented in the GenBank database. We have identified a new species of the genus Paucivitellosus - P. vietnamensis sp. n. - from L. subviridis, which differs from P. fragilis Coil, Reid et Kuntz, 1965 by metrical and molecular (18S rRNA) data, and from P. hanumanthai Mani, 1989 by metric features. Our results also show considerable molecular differentiation between P. vietnamensis sp. n. and Paucivitellosus spp. recovered from L. engeli and V. seheli in Vietnam.
2002年在越南吉婆岛附近东京湾的长鳍鲻（Liza longimanus，冈瑟）体内发现了利氏窄体吸虫（Lasiotocus lizae Liu）的成虫。在该地区，还在近缘鲻（Liza subviridis，瓦朗谢讷）、恩氏鲻（Liza engeli，布勒克）和塞氏凡塘鳢（Valamugil seheli，福斯科伊）体内发现了寡卵吸虫属（Paucivitellosus，双囊科）的吸虫。调查结果表明，利氏窄体吸虫的形态特征（如1971年的团状窄体吸虫L. glebulentus Overstreet）不符合窄体吸虫属的标准。此外，利氏窄体吸虫与已获得分子数据的其他窄体吸虫物种高度分化，包括2014年的无吻窄体吸虫L. arrhichostoma Searle、Cutmore et Cribb和典型窄体吸虫L. typicum（尼科尔，1912年）。系统发育分析表明，利氏窄体吸虫与GenBank数据库中呈现的窄体吸虫属其他物种有很大差异。我们从近缘鲻中鉴定出寡卵吸虫属的一个新物种——越南寡卵吸虫（Paucivitellosus vietnamensis sp. n.），其在测量数据和分子（18S rRNA）数据上与1965年的脆弱寡卵吸虫P. fragilis Coil、Reid et Kuntz不同，在测量特征上与1989年的哈氏寡卵吸虫P. hanumanthai Mani不同。我们的结果还表明，越南寡卵吸虫与从越南恩氏鲻和塞氏凡塘鳢中分离出的寡卵吸虫属物种之间存在显著的分子分化。
