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The structure and possible function of the ventral papillae of Notocotylus triserialis Diesing, 1839

Published online by Cambridge University Press:  06 April 2009

Barbara M. MacKinnon
Affiliation:
Department of Zoology, University of Aberdeen, Scotland

Summary

Notocotylus triserialis bears three rows of eversible papillae on its ventral surface. These papillae, which in living worms are firmly applied to the host mucosa, contain numerous pyriform cells. Histochemical tests indicate the presence, within the papillar cells, of protein, lipid, haemoglobin and esterase, and the absence of carbohydrate, acid mucopolysaccharide, RNA, haemosiderin and acid and alkaline phosphatase. Transmission electron microscopy shows the tegument of the papillae to be similar to the non-papillar ventral tegument. The pyriform cells contain many mitochondria with numerous cristae. A mechanism is proposed whereby the musculature of the worm effects the retraction and eversion of the ventral papillae.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1982

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