重庆地区鲫外寄生车轮虫形态分类学研究及一新种的描述(英文)
TAXONOMIC STUDY ON TRICHODINIDS PARASITIC ON GILLS OF FRESHWATER FISH, CARASSIUS AURATUS FROM CHONGQING, CHINA, WITH THE DESCRIPTION OF TRICHODINA BREVICIRRA SP. NOV.
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摘要: 在对重庆地区进行鱼类寄生虫学的调查过程中,从鲫鳃表获得3种隶属于车轮虫属Trichodina Ehrenberg,1830的外寄生车轮虫,其中含一新种,短棘车轮虫Trichodina brevicirra sp.nov,其典型的鉴别性特征为其短细的齿棘。另外两种车轮虫分别为沃玛车轮虫Trichodina ngoma Van As&Basson,1992与网状车轮虫Trichodina reticulata Hirschman&Partsch,1955;沃玛车轮虫为亚洲新记录种。文章对网状车轮虫的3种群进行了详尽的比较讨论研究,尽管该三种群间存在着细微的种群内差异,但网状车轮虫的典型特征则显而易见地存在于三种群间,即为附着盘中央具有8-16个球状或卵圆形的中央颗粒。Abstract: Three trichodinid ectoparasites (Ciliophora: Peritrichida) were isolated from the freshwater fish, Carassius auratus collected from Chongqing, China. Trichodina brevicirra sp. nov. is described as a new one characterized by the short and slim ray. The other two trichodinids are Trichodina ngoma Van As Basson, 1992 and Trichodina reticulata Hirschman Partsch, 1955. T. ngoma Van As Basson, 1992 is redescribed as a first record in Asia. Three populations of T. reticulata Hirschman Partsch, 1955 fall within the range of morphometry and agree closely in the overall appearance of the adhesive disc. Our observations suggest that denticle and central granules morphology may be more or less variable between and within populations, and that such minor differences should not be overestimated. It should be emphasized that there are 8 to 16 spherical or oval granules in central zone of adhesive disc.
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Keywords:
- Trichodinid /
- Trichodina brevicirra /
- Carassius auratus /
- New species /
- China
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