Scripps Institution of Oceanography, University of California, La Jolla, 92093-0202, USA.
Arthropod Struct Dev. 2012 May;41(3):281-91. doi: 10.1016/j.asd.2012.02.003. Epub 2012 Mar 8.
Mystacocarids are dioecious. Their gonopores are on the medial side of the third thoracic limb. The male's paired testes lie in the thorax and abdomen. They develop from paired rows of six small follicles dorsally. In the mature animal they fill most of the abdomen. The spermatophores develop within the follicles from spermatogonia mixed with follicle cells, which support and nourish the spermatocytes and produce the seminal fluid. The short vas deferens runs along the bottom of the testes and then continues forward to the gonopore. The vas deferens has a small group of cells near the gonopore that becomes a closure mechanism. The female has reproductive cells and also support cells that provide nutrition and form the wall of the ovary and oviduct. The unpaired female ovary begins in the third thoracic segment. During maturation, the oocytes are pushed posteriorly. The enormous mature ovum extends into a caudal pocket of the ovary. Starting with its anterior end, this ovum is extruded into the short oviduct, which extends laterally and ventrally to the gonopore. During extrusion, the pocket is reabsorbed from behind. There are no accessory structures connected to the reproductive system, nor any external specializations on the third limb.
腕足动物是雌雄异体的。它们的生殖孔位于第三胸肢的内侧。雄性的成对睾丸位于胸部和腹部。它们从背部的六排小滤泡中发育而来。在成熟的动物中，它们填满了大部分腹部。精原细胞与滤泡细胞混合，在滤泡中发育成精细胞，并产生精液。短的输精管沿着睾丸的底部运行，然后向前延伸到生殖孔。输精管在靠近生殖孔的地方有一小群细胞，形成一个封闭机制。雌性有生殖细胞和支持细胞，为卵巢和输卵管提供营养并形成其壁。未配对的雌性卵巢始于第三胸段。在成熟过程中，卵母细胞被推向后方。巨大的成熟卵子延伸到卵巢的尾部囊中。从卵子的前端开始，这个卵子被挤出到短的输卵管中，输卵管向侧面和腹侧延伸到生殖孔。在挤出过程中，囊从后面被吸收。生殖系统没有附属结构，第三肢也没有外部特化。
