鳋科（寄生桡足类）胸板的扫描电镜比较研究

本文利用扫描电镜观察了我国鳋科的5个属的种类。首次发现在它们的胸部腹面游泳足连接板之下均有一板状结构,其形状与栉齿的着生情况在不同属之间存在着明显的差异,同属不同种之间也不尽相同,这是一个过去未曾被注意过的结构,权且称之为胸板。它是一个独立的结构,不与连接板相连。胸板上的栉齿从形态-功能-适应三位一体分析,它与附着寄主有夭,以免被水流冲走,与无栉齿的相比,应是一个进步性状。

COMPARATIVE STUDY ON THE THORAX-PLATE OF ERGASILIDAE (PARASITIC COPEPODA) BY SCANNING ELECTRON MICROSCOPY

Five genera of Ergasilidae collected in China were studied by means of scanning electron(?) microscopy. It is found, for the first time, that on the ventral surface of thorax behind coupling bar of swimming legs there is a platelike structure with or without serration on its surface. The forms of platelike structure and serration are conspicuously different in the five genera as well as in different species of the same genus. The structure is tentatively named thorax plate. It is an independent structure, not connected with coupling bar. From the adaptation point of view, the serrated thorax-plate may have the functioa of anchoring to the host to avoid being swepted away by water current. Consequently, the presence of serration in thorax-plate is more advanced as compared with those lacking serration.