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《Chinese Journal of Zoology》 2007-03
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Histology of Male Reproductive System of Adult Neomysis japonica

YANG Li-Na ①② YANG Xiao-Zhen① TANG Bo-Ping② CHENG Yong-Xu ①WU Xu-Gan① CHEN Ya-Qu③(①Key Laboratory of Aquatic Genetic Resources and Aquaculture Ecosystem Certificated by the Ministry of Agriculture,Shanghai Fisheries University,Shanghai 200090;②Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection,Yancheng 224002;③East China Sea Fisheries Research Institute,Chinese Academy of Fisheries,Shanghai 200090,China)  
The anatomy and histology of male reproductive system of adult Neomysis japonica was observed.The results showed that the “n”-like male reproductive system of N.japonica included testis,vas deferens and penial sacculations.The symmetrical testis was composed of one “n” shape testicular cords,19 to 21 spermatocytic sacculations and 19 to 21 spermatidic pouches.The spermatidic pouch had a dorsal and slightly more lateral position relative to the spermatocytic sacculation and connected with vas deferentia through a short,narrow duct.The vas deferentia was an “n”-like tube lying dorsal to the testicular cords.Its forepart was linked with testis,and the left and right vas deferens extended and narrowed posteriorly.At the eighth segment,the vas deferens turned ventrally,narrowed to very thin canals,and then expanded to ampullas which open into penial sacs near the midline of the ventral side of the body.The wall of penial sacs included cuticle or exoskeleton and epithelium which had recovery or protection function,and the thick muscle layer contained the outer circular muscle and the inner longitudinal muscle.Germ cells gradually matured during moving from testicular cords and spermatocytic sacs to spermatidic pouches.The mature sperm had two parts:the shorter head and the longer tail,with an 15°angular juncture between them.Spermatozoa grouped into bundles which were transported into vas deferens through the duct of spermatocytic pouches and vas deferens,then into penial sacs.
【Fund】: 江苏省滩涂生物资源与环境保护重点建设实验室开放基金(No.JLCBE052002);; 上海市重点学科建设项目(No.Y1101);; 上海金沙滩投资发展有限公司水生生态与环境修复项目
【CateGory Index】: S917.4
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