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Zur Ultrastruktur von mÄnnlichem Genitaltrakt, Spermiocytogenese und Spermien vonPeripatopsis moseleyi (Onychophora)

Ultrastructure of male genital tract, spermiogenesis, and spermatozoa ofPeripatopsis moseleyi (Onychophora)

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Summary

The ultrastructure of the male genital tract ofPeripatopsis moseleyi has been examined under the electron microscope. In the testes somatic cells, spermatogonia and spermatocytes occur. In the spermatocytes electron-dense granules are built by the Golgi-apparatus. They are released from the developing spermatid and can still be detected in the spermatophore. The spermiogenesis takes place in the seminal vesicles. Nuclear condensation and elongation, formation of middle piece and acrosome are described. The mature sperm cell has an elongated nucleus, a middle piece containing mitochondria only and a tail with 9+2-formation and accessory microtubule systems. The spermatophore is built within the vas deferens the epithelial cells of which secrete great amounts of material enveloping the sperm mass.

Zusammenfassung

Die Ultrastruktur des Genitaltraktes vonPeripatopsis moseleyi wird beschrieben.

Im Hoden finden sich neben somalischen Zellen Spermatogonien und Spermatocyten. In letzteren werden in gro\er Zahl Sekreteinschlüsse gebildet, die spÄter zusammenflie\en und abgegeben werden; sie sind noch in der Spermatophore nachweisbar. Die Spermiocytogenese lÄuft in den Vesiculae seminales ab. Kernkondensation und -Umformung, Mittelstückformation und Akrosombildung werden beschrieben. Das reife Spermium hat einen langgestreckten Kern, ein Mittelstück, das nur aus Mitochondrien besteht, und einen Schwanz mit verschiedenen Mikrotubulus-Formationen. Die Spermatophorenbildung geht mit intensiver Sekretion der Epithelzellen des Vas deferens einher.

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Herrn Prof. Dr. O. Kraus (Zoologisches Institut, Hamburg) danke ich für die Anregung, über Onychophoren zu arbeiten, sowie für seine hilfreiche Unterstützung

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Ruhberg, H., Storch, V. Zur Ultrastruktur von mÄnnlichem Genitaltrakt, Spermiocytogenese und Spermien vonPeripatopsis moseleyi (Onychophora). Zoomorphologie 85, 1–15 (1976). https://doi.org/10.1007/BF00996061

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  • DOI: https://doi.org/10.1007/BF00996061

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