Descriptions of the Reproductive Organs of Nephelopsis obscura and Erpobdella punctata (Hirudinoidea:Erpobdellidae)

R. Singhal, R. Davies
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引用次数: 6

Abstract

During the study of the anatomy of mature Nephelopsis obscura and Erpobdella punctata the structure and distribution of the male and female reproductive organs were observed. The gonopores in N. obscura and E. punctata were separated by one and two annuli, respectively. In N. obscura, the multifollicular testes lie in two lateral columns in the form of bunches occupying the posterior third quarter of the body. Two U-shaped, elongated and tubular ovaries were present dorsal to the sperm duct and ventral to the alimentary canal, occupying five segments (XIII to XVII). The ratios between the body length and the length of the gonads (ovaries and testes) varied between 0.22 and 0.81. The length ratio of the testes to the ovaries ranged from 0.27 to 0.30. The reproductive organs of E. punctata were similar, although the ovaries and testes were longer.
黑桫椤和斑点桫椤生殖器官的描述(水蛭总目:斑点桫椤科)
在对成熟黑云杉和斑点云杉的解剖研究中,对雌雄生殖器官的结构和分布进行了观察。暗室蕨和点状蕨的性腺孔分别被1个和2个环隔。在隐囊n,多卵泡睾丸以束的形式位于两侧柱中,占据身体的后三分之一。精子管背侧和消化道腹侧分别有2个u形细长管状卵巢,共5节(XIII ~ XVII),体长与性腺(卵巢和睾丸)的比值在0.22 ~ 0.81之间。睾丸与卵巢的长度之比为0.27 ~ 0.30。斑蝽的生殖器官相似,但卵巢和睾丸较长。
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