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The Reproductive Systems of the Nudibranchia (Gastropoda, Opisthobranchia): Comparative Histology and Ultrastructure of the Nidamental Glands with Aspects of Functional Morphology

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The histology and ultrastructure of the nidamental glands (glandular oviduct) of 11 species of Nudibranchia are described and compared. Conclusions about functional morphology can be drawn from examination of animals preserved during the process of spawning. Generally speaking, all investigated species possess three structurally and functionally different parts in the nidamental glandular system. The proximal capsule gland forms an inner albuminous layer in the egg capsules, the following membrane gland builts the membrane around the embryo and the albuminous layer and in the distal mucous gland different mucus layers forming the spawn ribbon are successively added.

Keywords: Nudibranchia; genital system; histology; ultrastructure

Document Type: Original Article


Affiliations: Spezielle Zoologie, Ruhr-Universit├Ąt Bochum

Publication date: July 1, 2001


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