东方扁虾精子的超微结构

利用电镜研究了东方扁虾（Ｔｈｅｎｕｓ ｏｒｉｅｎｔａｌｉｓ）精子的形态和结构。精子由核、膜复合物区和顶体区３部分组成。核内含非浓缩的染色质、微管及细纤维丝，外被核膜；５～６条辐射臂自核部位伸出，臂内充满微管。膜复合物区位于核与顶体之间，由许多膜片层结构及其衍生的囊泡共同组成。顶体区由顶体囊和围顶体物质组成，顶体结构复杂，由顶体帽、内顶体物质和外顶体物质等构成；围顶体物质呈细颗粒状，主要分布于顶体囊

SPERM ULTRASTRUCTURE OF THE SQUAT LOBSTER,Thenus orientalis (Crustacea,Decapoda)

Morphology and ultrastructure of mature sperm of Thenus orientalis were studied with electron microscopy.Each sperm comprises a nucleus,membrane complex area and acrosomal region.The nucleus limited by a nuclear envelope contains uncondensed chromatin,microtubules and filaments.Five to six radial arms extend from the nucleus,and are stationary as well as packed with microtubules.The membrane complex area,which lies between the nucleus and the acrosomal region,contains numerous lamellar membrane structure and vesicle which originate from the lamellar membrane structure.The acrosomal region includes acrosomal vesicle and periacrosomal material.The acrosome is structurally complex and comprised of acrosomal cap,inner and outer acrosomal material.The periacrosomal material is finely granular with most of it lying at the sides of the acrosomal vesicle.The mode of acrosome reaction of Palinura sperm was also discussed in this paper.