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KMID : 0364219800230010013
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Korean Journal of Zoology
1980 Volume.23 No. 1 p.13 ~ p.24
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Observations on Spermatogenesis in Gerris paludum (Heteroptera)
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Lee Young-Hwan
Lee Chang-Eon
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Abstract
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The germarium contains the apical complex consisting of a multinucleated syncytium. Apical complex has a nutritive role for the early spermatogonia. Trophocytes are irregularly shaped and are distributed throughout the space from spermatogonial cysts to sperm bundles, and they increase in size by endopolyploidization. As meiotic divisions are not complete until the final moult, spermatogenesis continues even in the adult. Chromosome number is 2n=24. Spermiogenesis is divided into seven stages in terms of chromatin concentration, cytoplasmic granules, and the nuclear size and shape. These stages could be grouped into the spherical, the elongating and the rodform spermatids in shape.
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KEYWORD
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