Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges connecting spermatogenic cells in the black snail, Semisulcospira libertina (Mollusca, Mesogastropoda)

• Published in: Tissue & cell Vol. 37; no. 1; pp. 75 - 79
• Main Authors: Okura, N., Kurihara, K., Yasuzumi, F.
• Format: Journal Article
• Language: English
• Published: Scotland Elsevier Ltd 01-02-2005
• Subjects: Actin Cytoskeleton - ultrastructure; Animals; Cell membrane; Cell Membrane - ultrastructure; Cross striation; Cytoplasm - ultrastructure; Cytoplasmic bridge; Male; Microfilament bundle; Microscopy, Electron, Transmission; Semisulcospira libertina; Snails - ultrastructure; Spermatids - ultrastructure; Spermatocytes - ultrastructure; Spermatogenic cell; Spermatogonia - ultrastructure; Testis - ultrastructure; Microfilament bundle; Spermatogenic cell; Cytoplasmic bridge; Cross striation; Cell membrane; Semisulcospira libertina
• ISSN: 0040-8166; 1532-3072
• DOI: 10.1016/j.tice.2004.10.001

Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges between spermatogenic cells are described in the black snail,
Semisulcospira libertina. The bundles were occasionally observed in bridges connecting spermatogonia, spermatocytes and typical spermatids. Relations between bundles and centrioles could not be detected. The bundle had electron dense cross bands with a periodicity of approximately 200
nm, and attached to the membrane with almost right angle at the cross linker level. Phalloidin cytochemistry revealed that the bundle contained F-actin. In a case, a bundle connected two cytoplasmic bridges.