Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges connecting spermatogenic cells in the black snail, Semisulcospira libertina (Mollusca, Mesogastropoda) |
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Authors: | Okura N Kurihara K Yasuzumi F |
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Institution: | Division of Anatomy, Department of Morphological and Functional Medicine, School of Medicine, University of the Ryukyus, Nishihara, Okinawa, 903-0215, Japan. okura@med.u-ryukyu.ac.jp |
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Abstract: | 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. |
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Keywords: | Microfilament bundle Cross striation Cytoplasmic bridge Cell membrane Spermatogenic cell Semisulcospira libertina |
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