雷帕纹唇鱼寄生似指环虫属单殖吸虫一新种  

A New Species of Genus Dactylogyroides(Monogenea:Dactylogyridae)Parasiticzing Osteochilus repang

作　　者：常静 孟飞燕[1,2] 邓晋琪 徐伟江 范丽仙[1,2] CHANG Jing;MENG Feiyan;DENG Jinqi;XU Weijiang;FAN Lixian(School of Life Science,Yunnan Normal University,Kunming 650500,China;Engineering Research Center of Sustainable Development and Utilization of Biomass Energy,Ministry of Education,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学生命科学学院,昆明650500 [2]云南师范大学生物能源持续开发利用教育部工程研究中心,昆明650500

出　　处：《四川动物》2024年第4期448-458,共11页Sichuan Journal of Zoology

基　　金：国家自然科学基金项目(32060115,31260507,31560589)。

摘　　要：采用整合分类学研究方法,综合形态特征和28S rDNA序列的遗传学特征,记述和命名了云南南盘江万峰湖流域段雷帕纹唇鱼Osteochilus repang鳃部寄生的似指环虫属Dactylogyroides一新种,以宿主鱼学名命名为纹唇鱼似指环虫新种D.osteochilus sp.nov.。纹唇鱼似指环虫新种具有1对钩尖互对的中央大钩,7对边缘小钩,1个呈片状且分成相等两半的联结片。交接管呈管状,基部膨大,支持器基部片状,中间有一小孔。本新种在联结片、交接器形态上与该属已记录种显著不同。基于28S rDNA部分序列,似指环虫属属内种的两两相对遗传距离为0.052~0.175,本新种与似指环虫属已记录种D.tripathii(JX993982)的遗传距离为0.076,与D.dorsalis的为0.175。基于28S rDNA部分序列的BI系统发育树的拓扑结构显示,本新种与似指环虫属物种聚为一个进化支,并与指环虫属Dactylogyrus进化支为亲缘关系较近的姐妹群。纹唇鱼似指环虫新种是我国记录的第2个似指环虫属单殖吸虫,研究结果补充了我国单殖吸虫编目,并为似指环虫属的分子系统发育提供了新的科学数据。In this study,a new species of Dactylogyroides parasitized on the gills of Osteochilus repang(105°2′85″E,24°9′53″N)in Wanfeng Lake Basin of Nanpanjiang River,Yunnan Province,was named after the host fish:D.osteochilus sp.nov.It was described and named by means of integrated taxonomic research,combining morphological characteristics and genetic characteristics of 28S rDNA sequence.The new species has a pair of central hooks,with hooks pointing at each other,7 pairs of marginal hooks,and 1 lamellar connecting piece divided into equal halves.The copulatory tube of the male copulatory complex is tubular with expanded end.The base of the support accessory piece is sheet-like with a small hole in the middle.Dactylogyroides osteochilus sp.nov.is significantly different from the recorded species of genus Dactylogyroides in connecting piece and copulatory complex morphology.Based on the 28S rDNA sequence,the intragenus genetic distances among Dactylogyroides ranged from 0.052 to 0.175,and the genetic distance of the new species with D.tripathii(JX993982)and D.dorsalis were 0.076 and 0.175,respectively.In addition,the phylogenetic tree(BI)constructed based on 28S rDNA showed that the new species was clustered into a clade with Dactylogyroides,which is a close sister group to Dactylogyrus.Dactylogyroides osteochilus sp.nov.is the second new Dactylogyroides species recorded in China,and thus this study enriches the catalogs of Monogenea in China and provides new scientific data for the molecular phylogeny of the genus Dactylogyroides.

关 键 词：单殖吸虫 似指环虫属 新种 28S rDNA 

分 类 号：Q959.153[生物学—动物学]