𝔖 Bobbio Scriptorium
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Ultrastructural investigation of the mechanism of muscle attachment to the gastropod shell

✍ Scribed by Alex S. Tompa; Norimitsu Watabe

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
931 KB
Volume
149
Category
Article
ISSN
0362-2525

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✦ Synopsis

Abstract

The ultrastructure of the muscle‐shell attachment was investigated in the land pulmonate snails Helix aspersa, Anguispira altemata, in the freshwater pulmonate Laevipex sp., and in the freshwater prosobranch Pomacea paludosa. In all cases, a collagenous intercellular matrix and a specialized epithelium (tendon cells) intervene between the columellar muscle and the shell. These tendon cells are characterized by hemidesmosomes at both apical and basal ends, connected by thick bundles of microfilaments. The tendon cells do not insert into the shell directly by microvilli, as formerly thought, but by an extensive network of extracellular organic fibers.

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