During the investigation of freshwater trichodinids from Minjiang River Valley, twelve species of trichodinids were obtained from freshwater fishes, Silurus asotus , Carassius auratus , Misgurnus anguillicaudatus , Pelteobagrus f ulvidraco, Hypophthalmichthys molitri, Cyprinuscarpio and Ophicephalus argus. Ten of the 12 species fall into the Trichodina, namely, the Trichodina domerguei （Wallengren, 1897）, T. mutabilis Kazubski ＆ Migala, 1968, T. modesta Lom, 1970, T. acuta Lom, 1961, T. hyperparasitis Chen ＆ Hsish, 1984, T. rostrata Kulemina, 1968, T. kazubski Van As ＆ Basson, 1989, T. reticulata Hirschman ＆Partsch, 1955, T. nobilis Chen, 1963, T. uniforma Van As ＆ Basson, 1989; and one fall into the Trichodinella, which is called Trichodinella epizootica Sramek ＆ Husek, 1953 and one falls intoTripartiella that is called Tripartiella rnacrosomaBasson ＆ Van As, 1987. T. domerguei Wallengren, was first recorded in 1897 in Sichuan and Hypophthalmichthys molitrix is an entirely new host record in Sichuan since T. rostrata Kulemina, 1968. By way of vivipereeption and dry silver impregnation method, all the subjects were examined under the Nikon E--600 microscope. All measurements are presented in μm and follow the uniform specific characteristic system proposed by Lom （1958）. A detailed description of the denticles is presented in accordance with the method proposed by Van As ＆ Basson （1989）.%在对四川岷江地区淡水车轮虫的调查研究过程中，于几大重要经济养殖鱼类大口鲶、鲫、泥鳅、黄颡鱼、鲢、鲤及乌鳢鳃上获得12种外寄生车轮虫：其中车轮虫属10种，即杜氏车轮虫Trichodina domerguei（Wallengren，1897）、易变车轮虫T．mutabilis Kazubski ＆ Migala，1968、适度车轮虫Zmodesta Lom，1970、急尖车轮虫T．acuta Lom，1961、重寄生车轮虫T．hyperparasitis Chen ＆ Hsish，1984、喙状车轮虫T．rostrata Kulemina，1968、卡氏车轮虫T．kazubski VanAs ＆ Basson，1989、网状车轮虫T．reticulata Hirschman ＆ Partsch，1955、显著车轮虫T．nobilis Chen，1963、单型车轮虫T．uniforma Van As ＆ Basson，1989；小车轮虫属1种，即周从小车轮虫Trichodinella epizootica Sramek ＆ Husek，1953；三分虫属1种，即大型三分虫Tripartiella macrosoma Basson ＆ Van As，1987．采用活体观察及干银染色法，运用国际间统一特定方法及齿体定位描述方法对12种车轮虫进行了详细的形态学重描述；讨论了不同车轮虫种群的形态学特征．本研究中的杜氏车轮虫为四川地区新记录种；寄主鱼一鲢是喙状车轮虫的宿主新记录．
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