钟形钟虫形态学及表膜下纤维系统的研究

STUDIES ON THE MORPHOLOGY AND INFRACILIATURE OF VORTICELLA CAMPANULA (PROTOZOA, CILIOPHORA, PERITRICHIDA)

利用活体观察及蛋白银染色技术对钟形钟虫的形态学及表膜下纤维系统进行了研究 ,分别给出活体及蛋白银制片后标本的鉴别特征及表膜下纤维系统。本种活体鉴定主要特征为虫体呈宽钟状 ,细胞质不透明 ,镜下明显可见有散布的脂滴存在。蛋白银制片特征为口器明显呈横位 ,第 1(P1)和第 2咽膜 (P2 )汇合后形成的短咽膜弯曲程度较甚。纵向纤维粗壮而稀疏 ,40— 5 0条 ;口围盘纤维网粗壮 ,呈轮辐状排布 ,相邻两轮辐外部末端多呈闭合态 ;第 3咽膜 (P3)由 3排毛基索组成 ,其靠近P2 侧的一列毛基索在P1与P3 的汇合处终止 ,其长度只及另外两条毛基索长度的一半 ,故由P1和P3 汇合后所组成的咽膜共由 5排毛基索构成。对以上特征在分类学上的意义进行了讨论。

The morphology and infraciliature of Vorticella campanula Ehrenberg, 1831 were investigated and described from life and protargol impregnated specimens. Wuhan population of this species is characterized by: body constantly wide-belled shaped with one layer of peristomial lip considerably everted and peristomial disc moderately elevated; one contractile vacuole apically positioned; cytoplasm opaque with numerous lipoid globelet; oral apparatus typical of the genus of Voticella, the peniculus 3 composed of 3 rows of kineties, of which one near the peniculus 2 was stopped at the joint of peniculus 1 and 3, about 1/2 of the two peniculus in length; the longitudinal fibre coarsefibred, sparse, ca 40-50, while the fibre of the peristomal disc net coarse and shows as the spoke-like. Additionally, the taxonomic implication of above features was discussed.