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本文对栖息在我国淡水鱼苗培育池及水稻田中的6种原蚌虫(隶属于甲壳门,鳃足纲,介甲目,蚌壳虫科)进行了分类记述。其中的兖州原蚌虫Eocyzicus yanzhouensis sp.nov.及拟莱阳原蚌虫E.paralaiyangensis sp.nov.系2新种。分别列表比较了新种与其近似种佩里原蚌虫E.perrieri Daday,1914,多刺原蚌虫E.spinfer Durga Prasad et al,1981及莱阳原蚌虫E.laiyangensis Hu,1985的主要形态区别特征。文中附有6种原蚌虫的检索表及形态特征图54幅。本文记述种的名录如次: 1.东方原蚌虫Eocyzicus orientalis Daday,1914; 2.蒙古原蚌虫E.mongolianus Ueno,1927; 3.戴维原蚌虫E.davidi(Simon,1886)Brtek et al,1984; 4.莱阳原蚌虫E.laiyangensis Hu,1985; 5.兖州原蚌虫,(新种)E.yanzhouensis sp.nov.; 6.拟莱阳原蚌虫,(新种)E.paralaiyangensis sp.nov.
In this paper, six species of the original mussel (belonging to the crustacean, gill footpath, thyme, clam shell) living in freshwater fishes breeding ponds and paddy fields in China were categorized and described. Among them, two new species of Eocyzicus yanzhouensis sp. Nov. And E. pararaiyangensis sp.nov. The main morphological differences between the new species and its approximate species, E.perrieri Daday, 1914, E. spinfer Durga Prasad et al, 1981, and E. laiyangensis Hu, 1985, were compared on a tabulated list. feature. Attached to the text of the original species of 6 species of woodworm and morphological characteristics of 54 maps. The species described in this document are listed below: 1. Eocyzicus orientalis Daday, 1914; 2. E. mongolianus Ueno, 1927; 3. E. davidi (Simon, 1886) Brtek et al, 1984; 4. Laiyang clam E.laiyangensis Hu, 1985; 5. Yanzhou original clam, (new species) E. yanzhouensis sp.nov .; 6. Lai Lai original clam, (new species) E.paralaiyangensis sp .nov.