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Ultrastructure of the lycophora larva ofGyrocotyle urna (Cestoda, Gyrocotylidea)

IV. The glandular system

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Summary

The fine structure of the glands of the lycophora larva ofGyrocotyle urna is described. There are four pairs of different glands which can be differentiated by the ultrastructure of their vesicles, their location and their gland pores. Their cell bodies are located at the transition from the median to the posterior third of the larva. Gland ducts formed by extensions of the gland cells run anteriorly and terminate at the anterior tip of the larva. In the cytoplasm of the terminal duct regions peripheral microtubules are found. The structure and function of the glands inGyrocotyle is discussed with regard to the evolution of cestodes and other Neodermata.

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  1. Institut für Allgemeine und Spezielle Zoologie, Justus-Liebig-Universität, Stephanstrasse 24, D-6300, Gießen, Germany

    W. E. R. Xylander

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Xylander, W.E.R. Ultrastructure of the lycophora larva ofGyrocotyle urna (Cestoda, Gyrocotylidea). Zoomorphology 109, 319–328 (1990). https://doi.org/10.1007/BF00803572

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  • DOI: https://doi.org/10.1007/BF00803572

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