Trochus pyramis Born is of gonophores.The male reproductive system is mainly composed of the spermaries and spermaductus, instead of mating and others glands.
摘要塔形马蹄螺为雌
异
，其性
统主要由精巢和输精管组成，没有交
器，也没有其他的附属腺。
统Trochus pyramis Born is of gonophores.The male reproductive system is mainly composed of the spermaries and spermaductus, instead of mating and others glands.
摘要塔形马蹄螺为雌异，其性统主要由精巢和输精管组成，没有交器，也没有其他的附属腺。
4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.
涡虫是雌
的，统适于内受精。单起源的吸虫（单纲）大多是鱼的外寄虫。
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