Abstract：
:The ultrastructure of peduncle muscle attachment to the cuticular flange in the opercular filament of the serpulid Pomatoceros lamarckii Quatrefages is described. The cuticular flange is composed of layers of orthogonally arranged fibres. Specialized epithelial cells (tendon cells) and a collagenous matrix intervene between the peduncle muscles and the cuticular flange. The tendon cells are characterized by hemidesmosomes at both apical and basal ends, connected by thick bundles of tonofilaments. Apically long specialized microvilli from the tendon cells penetrate the cavities in the orthogonally arranged layers of fibres of the cuticular flange. The basal surfaces of the tendon cells and the terminal ends of the peduncle muscles anchor independently of one another in the collagenous matrix. The peduncle muscles appear to be smooth muscles which contain thin filaments, 5 nm in diameter, and thick filaments, 40-100 nm in diameter, with a faint axial periodicity 12-14 nm. The method of peduncle muscle attachment in the opercular filament is compared with those of other invertebrates.
journal_name
Tissue Celljournal_title
Tissue & cellauthors
Bubel Adoi
10.1016/0040-8166(83)90007-1subject
Has Abstractpub_date
1983-01-01 00:00:00pages
555-72issue
4eissn
0040-8166issn
1532-3072pii
0040-8166(83)90007-1journal_volume
15pub_type
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