版纳鱼螈的生殖系统解剖

A Study on Reproductive System of the Yunnan Caecilian Ichthyophis bannanica

版纳鱼螈(Ichthyophis bannanica)是我国无足目(Apoda)的仅有代表,本研究采用传统的解剖学方法对版纳鱼螈的生殖系统进行观察比较。研究结果表明,雌性生殖系统由卵巢、输卵管、脂肪体和泄殖腔构成;雄性生殖系统由精巢、输精(尿)管、缪氏管、脂肪体、泄殖腔和交配器所组成。卵巢一对,半透明长囊状,内含许多大小不一的球状卵母细胞。精巢一对,分叶状,每小叶包含许多小室,存在小叶融合现象。

The Yunnan Caecilian lchthyophis bannanica is the only species of Apoda found in China. The traditional anatomical technique was applied to study the morphology of the reproductive system of I. bannanica. The results showed that the female reproductive system of I. bannanica was composed of ovaries, oviducts, fat bodies and cloaca ; the male reproductive system contained testis, urogenital ducts, Muellerian ducts, fat bodies, cloaca and phallodeum. The ovary was a paired elongate sac-like structure, characterized by large numbers of pale cream-colored oocytes. The testis was a paired, elongate, and multi-lobed structure. Each lobe contained a number of locales. The fusion of testis lobes was also observed.