Summary
The fine structure of the body wall muscle of the pentastomid Reighardia sternae is described. The muscle fibres are separated from one another and form two layers, circular and longitudinal. They are cross-striated with approximately 11 actin filaments surrounding each myosin filament. The T-system consists of simple in-pushings of the sarcolemma. The SR is also simple and forms both dyadic and triadic contacts with the T-system tubules and dyadic contacts with the sarcolemma. Electron-dense inclusions occur, usually in the vicinity of the Z-lines, and it is suggested that these may be composed of unsaturated lipids.
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Mill, P.J., Riley, J. An ultrastructural study of the body wall muscles of the pentastomid Reighardia sternae dies. 1864 parasitic on the herring gull Larus argentatus pontopp. Z.Zellforsch 130, 12–17 (1972). https://doi.org/10.1007/BF00306991
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DOI: https://doi.org/10.1007/BF00306991