Kim Sung Han
Faculty of Marine Applied Bioscience, Kunsan National University, Gunsan 54150, Korea.
Dev Reprod. 2016 Sep;20(3):247-254. doi: 10.12717/DR.2016.20.3.247.
Cytological changes of the epithelial cells according to the developmenatal phases of the seminal vesicle related to the spermatogenic stages in the testicular lobules during spermagenesis in male () (Gastropoda: Buccinidae) were investigated monthly by electron microscopical and histological observations. . () cumingii is dioecious, and an internal fertilization species. The male genital organ is located near the tentacles. The spermatozoon is approximatley 50 μm in length. The axoneme of the tail flagellum consists of nine pairs of microtubles at the periphery and one pair at the center. The process of germ cell development during spermatogenesis can be divided into five succesive stages: (1) spermatogonia, (2) primary spermatocytes, (3) secondary spermatocytes, (4) spermatids, and (5) spermatozoa. A considerable amount of spermatozoa make their appearance in the testicular lobules (or acini) and some of them are tranported from the testis towards the seminal vesicles until late July. In this study, the developmental phases of the epithelial cells of the seminal vesicles of . () could be classified into four phases: (1) S-I phase (resting), (2) S-Ⅱphase (early accumulating), (3) S-Ⅲ phase (accumulating), and (4) S-IV phase (spent). However, in case of N. (B.) arthritica cumingii, the developmental phases of the seminal vesicle were devided into three phases: (1) resting, (2) accumulating and (3) spent. Granular bodies in the inner layer of the seminal vesicles are involved in resorption of digestion of residual spermatozoa.
在雄性（）（腹足纲：蛾螺科）精子发生过程中，通过电子显微镜和组织学观察，每月研究精囊上皮细胞的细胞学变化与睾丸小叶生精阶段的关系。（）cumingii是雌雄异体的体内受精物种。雄性生殖器官位于触手附近。精子长度约为50μm。尾鞭毛的轴丝由外周的九对微管和中央的一对微管组成。精子发生过程中生殖细胞的发育过程可分为五个连续阶段：（1）精原细胞，（2）初级精母细胞，（3）次级精母细胞，（4）精子细胞，（5）精子。大量精子在睾丸小叶（或腺泡）中出现，其中一些在7月下旬之前从睾丸运输到精囊。在本研究中，（）精囊上皮细胞的发育阶段可分为四个阶段：（1）S-I期（静止期），（2）S-Ⅱ期（早期积累期），（3）S-Ⅲ期（积累期），（4）S-IV期（消耗期）。然而，对于关节炎cumingii来说，精囊的发育阶段分为三个阶段：（1）静止期，（2）积累期，（3）消耗期。精囊内层的颗粒体参与残留精子的消化吸收。
