黑斑口虾蛄雄性生殖系统的组织学与超微结构

黑斑口虾蛄雄性生殖系统由精巢、输精管、交接器及副性腺组成。精巢呈管状,末段较直,向前逐渐弯曲,在第七、八胸节处盘曲成耳状。输精管管壁有一层上皮细胞,但无肌细胞;输精管为精巢顶端延伸,两者管径大小很接近。交接器位于第八胸节基部,为棒状结构,连接端较软,呈膜状,可自由弯曲;游离端较硬,外有甲壳质。1对雄性副性腺位于第4～7胸节间,呈细丝状,左右末端各与同侧的输精管共同平行注入交接器中。末段精巢腔内充满着不同发育阶段的精细胞,从末段精巢向后、中、前段精巢、输精管及交接器,精细胞逐渐趋向成熟。成熟精细胞呈卵圆形,外围厚膜,大小约8.5μm×7.0μm,无鞭毛,未发现有顶体结构。

Histology and ultrastructure of male reproductive system of Oratosquilla kempi

The male reproductive system of Oratosquilla kempi includes: testis, vas deferens, penis, and accessory sex gland. The duct..shaped testis, with a straight end, curves forward gradually and finally curls into a ear..like structure at the seventh and eighth thoraxmeron. The wall of vas deferens has no muscles. There is a stick..like penis at the base of the eighth thoraxmeron, and the join point, like a membrane, is soft enough to curve freely , but the free end is relatively hard with crust around. Between the fourth and seventh thoraxmeron, a pair of male accessory sex glands could be seen, like thin silk, and lef t and right ends reach penis paralleled by the same side vas deferens respectively. The testis cavity.. s tip is f illed with spermatid of different developmental stages which are gradually maturing from the tip to post.., mid.., and front..end testis, then to vas deferens and penis. The spermatid is egg.. shaped with thick membrance but without flagellum and acrosome, and its size is about 8. 5..m .. 7. 0..m.