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澜沧江奇额墨头鱼寄生指环虫属单殖吸虫一新种记述
Description of A New Species of Genus Dactylogyrus (Monogenea: Dactylogyridae) Parasitizing Gills of Host Fish Garra mirofrontis from Lancang River, Yunnan Province
肖靖芳1, 李俊2, 孟飞燕1, 王建军3, 徐伟江1, 范丽仙1*
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DOI:
作者单位:1. 云南师范大学生命科学学院, 生物能源持续开发利用教育部工程研究中心, 昆明650500;
2. 云南农业大学农学与生物技术学院, 昆明650201;
3. 西双版纳州环境监测站, 云南景洪666100
中文关键字:澜沧江;奇额墨头鱼;指环虫属;新种
英文关键字:Lancang River; Garra mirofrontis; Dactylogyrus; new species
中文摘要:记述了澜沧江云南省西双版纳景洪流域段(22°00.288'N,100°47.430'E)奇额墨头鱼Garra mirofrontis寄生指环虫属Dactylogyrus单殖吸虫一新种:澜沧江指环虫Dactylogyrus lancangjiangensis sp.nov..宿主鱼类的自然感染率为68%(19/28).吸虫平均大小为317 μm×101 μm.后吸器由1对中央大钩、7对边缘小钩、联结片和副联结片组成;联结片呈一字形,中部狭窄,两端较宽;副联结片呈月牙形;交接器包括交接管和支持器,交接管基部膨大呈球形,后部缢缩形成细管,并盘曲成3~5圈螺旋;支持器呈复杂棒状,交接管端部从中穿过.本种在后吸器和雄性交接器上与指环虫属已记录种存在明显差异,同时鉴于单殖吸虫具有较强的宿主特异性,认为该种是科学上一未记录种.模式标本保存于云南师范大学生命科学学院.
英文摘要:A new species of genus Dactylogyrus (Monogenea: Dactylogyridae), Dactylogyrus lancangjiangensis sp.nov., from gills of the host Garra mirofrontis (Cyprinidae) was described in this study. The host was collected from Jinghong city of Lancang River basin, Xishuangbanna of Yunnan Province, 22°00.288' N, 100°47.430' E. Out of the 28 fishes, 19 were infected with the new parasites with prevalence 68%. The mean total body length was about 317 μm, and the mean total body width was 101 μm. The haptor of the new species was consisted of a pair of anchors, 7 pairs of marginal hooks and a connection piece and a accessory connection piece. The connection piece was line-shaped, and became narrow in the middle but wide on both ends; the connection accessory piece was moon-shaped. The copulatory organs were prominent with copulatory tube and hander. The base of copulatory tube was spherically dilated and directly narrowed to form a very thin tube bending 3 to 5 spirals. The hander was clavate and complex, and the end of copulatory tube was throughout the hander. The taxonomic feture of the new species was distinctly distinguished from the recorded Dactylogyrus species, especially the male copulatory organs and haptoral sclerites. In view of the host-specificity and coevolution between Monogenea-fish associations, D. lancangjiangensis sp. nov. was considered as a new species. The specimens were conserved in School of Life Sciences, Yunnan Normal University.
2015,34(3): 403-406 收稿日期:2014-9-3
DOI:10.3969/j.issn.1000-7083.2015.03.014
分类号:Q959.152
基金项目:国家自然科学基金项目(No.30660022,No.30960049,No.31260507);云南省社会发展应用基础研究项目(No.2005C0019Q,No.2009CD049)
作者简介:
*通讯作者:范丽仙,,E-mail:anne330@163.com
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