Gwo J C, Yang W T, Sheu Y T, Cheng H Y
Department of Aquaculture, Taiwan National Ocean University, Keelung.
Tissue Cell. 2002 Feb;34(1):39-43. doi: 10.1054/tice.2002.0222.
Using transmission and scanning electron microscopy, the mature spermatozoa of four bivalves of the family Veneridae--Gafrarium tumidum and Circe scripta (Circinae), Pitar sulfureum (Pitarinae) and Gomphina aequilatera (Tapetinae)--are described for the first time and compared with those of other bivalves, particularly other heterodonts. As our observations show, the spermatozoa of these four species are of the primitive type or ect-aquasperm form. The head contains a slightly curved nucleus with a short cone-shaped acrosome. The structure of the acrosome is typical of heterodont bivalves and two major components of the acrosomal vesicle material can be distinguished. The midpiece exhibits four or five mitochondria which surround the proximal and the distal centrioles. Variation in the shape and dimensions of the acrosomal vesicle and nucleus is substantial in these four Veneroidea species.
利用透射电子显微镜和扫描电子显微镜，首次描述了帘蛤科四种双壳贝类——膨润格特蛤和刻纹圆扇蛤（圆扇蛤亚科）、硫黄厚大蛤（厚大蛤亚科）和平坦缀锦蛤（缀锦蛤亚科）的成熟精子，并与其他双壳贝类，特别是其他异齿亚纲动物的精子进行了比较。正如我们的观察所示，这四个物种的精子属于原始类型或外海型精子形态。头部含有一个略弯曲的细胞核和一个短的锥形顶体。顶体的结构是异齿双壳贝类的典型结构，可以区分顶体小泡物质的两个主要成分。中段有四五个线粒体，围绕着近端和远端中心粒。在这四种帘蛤超科物种中，顶体小泡和细胞核的形状和尺寸变化很大。
