Evolutionary regularities of the somatic polyploidy manifestation in salivary glands of gastropod molluscs. IV. a subclass of Pectinibranchia: Orders Hamiglossa and Toxoglossa (Neogastropoda)
Ziumchenko, N.E.; Anisimov, A.P.
Tsitologiia 44(5): 431-440
2002
ISSN/ISBN: 0041-3771 PMID: 14696252 Document Number: 543374
Salivary glands of 12 species of carnivorous gastropod molluscs, making the Neogastropoda group have been investigated by histochemical methods and DNA cytophotometry. We studied the anatomical and histological structure of ordinary (acinous) and accessory (tubular) salivary glands, and of unpaired glands (Leiblen's, "framboisée", and poisonous). Cells of three types were distinguished: granular cells (with glycoproteid granular inclusions), mucocytes-I (with sulfatic acid mucopolysaccharides), and epithelial ciliated cells. In ordinary and accessory glands of the studied Neogastropods, polyploid cells with polyploidy levels from 4c to 16c were revealed together with diploid cells. The functional significance and phylogenetic tendencies of polyploidy manifestation in salivary glands of prosobranch gastropods are discussed.