澜沧江？条寄生指环虫属两新种记述
Two New Species of Genus Dactylogyrus Diesing, 1850 (Monogenea: Dactylogyridae) Parasitizing Hemiculter leucisculus (Cyprinidae) from the Langcang River, China

中文摘要：本文记述了云南澜沧江水系景洪流域段（100°47'43″E，22°0'28″N）条 Hemiculter leucisculus（Basilewsky，1855）鳃丝上寄生指环虫属 Dactylogyrus 2新种，以采集地命名为版纳指环虫 Dactylogyrus bannaensis sp. nov.和景洪指环虫 D. jinghongensis sp. nov.。版纳指环虫和景洪指环虫均为双联结片虫，基于后吸器，尤其是中央大钩、边缘小钩和交接器的形态学特征，鉴定为指环虫属科学上2新种。版纳指环虫交接器的形态有别于记录种船茎指环虫 D. nilkolskyi Gussev，1955，版纳指环虫的交接管呈长带状，延伸至虫体左侧边缘阴道口处，末端微弯；感染率100%（40/40）。寄生于同一宿主的景洪指环虫，其交接器的形态有别于记录种红鲌指环虫 D. erythroculteris和锥花指环虫 D. pannosus，景洪指环虫的交接器呈彩虹状，交接管的一端基部膨大成漏斗状，另一端折叠；支持器“V”形，且中间包绕交接管；感染率100%（40/40）。
英文摘要：This study described two new species of the genus Dactylogyrus, which were collected from the gills of the cyprinid fish Hemiculter leucisculus (Basilewsky, 1855). The cyprinid fish were collected from the Lancang River, Jinghong basin of Yunnan province, 100°47'43″E, 22°0'28″N. The two new Dactylogyrus species are freshwater species and double-bar species. Based on the morphological differences of the types of haptoral sclerites and male copulatory organs (MCOs), the new two species Dactylogyrus bannaensis sp. nov. and D. jinghongensis sp. nov. were named according to the location of their hosts, respectively. D. bannaensis sp. nov. was distinguished by the different features from all the recorded species of the genus, especially D. nilkolskyi Gussev, 1955. D. bannaensis sp. nov. has a male copulatory organ with a copulatory tube that elongate into left body margin of the parasite, distally recurved, directed straight process, long-ribbon-like, also possessing a complex accessory piece. And the infection rate of this parasite is 100%(40/40). The other new species D. jinghongensis sp. nov., parasitizes the same host as Dactylogyrus bannaensis sp. nov., is distinguished by the rainbow-like copulatory organ from its congeners ( D. erythroculteris and D. pannosus). For the MCOs of D. jinghongensis, one of the ends expansion and funnel-type, distally extending to shaft fold and a V-type accessory piece, middle part enclosing copulatory tube and distal part process an attenuated tube. The infection rate of D. jinghongensis is also 100%(40/40). 2016,35(5): 709-718 收稿日期：2015-12-07 DOI：10.11984/j.issn.1000-7083.20150391 分类号：Q959.153 基金项目：国家自然科学基金项目（30660022；30960049；31260507） 作者简介：孟飞燕(1991-),女,硕士研究生,主要从事鱼类单殖吸虫分类学研究,E-mail:1217706285@qq.com *通讯作者：范丽仙,主要从事寄生虫分类学研究,E-mail:anne330@163.com 参考文献： 白俊萍, 王建军, 李俊, 等. 2014. 澜沧江黄尾短吻鱼寄生拟双身虫属一新种[J]. 四川动物, 33(4): 540-544. 吴宝华, 郎所, 王伟俊. 2000. 中国动物志(扁形动物门: 单殖吸虫纲)[M]. 北京: 科学出版社: 139-173. Bychowsky BE. 1933. Die Bedeutung der monogenetischen Trematoden fur die Erforschung der systematischen Beziehungen der Karpfenfische[J]. Zoologischer