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  • Title: Ultrastructure of cardiac muscle of Trochosa terricola Thor., Pardosa amentata Clerck, P. pullata Clerck, and Pisaura mirabilis Clerck (Araneae: Lycosidae, Pisauridae).
    Author: Midttun B.
    Journal: Cell Tissue Res; 1977 Jul 15; 181(3):299-310. PubMed ID: 884708.
    Abstract:
    The ultrastructure of the cardiac muscle in some araneae has been investigated. The sarcolemma invaginates at the Z band and may extend into the cells through several myofibrils. Numerous T-tubules are given off both from sarcolemmal invaginations and also directly from the cell surface. In passing through the Z band, the luminal diameter of T-tubules greatly increases. Dyadic and a few triadic couplings are found mainly at the A-I level. Peripheral couplings were not seen.
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