Summary
The ultrastructure of the acrosome reaction in the sperm of the teredo, Bankia australis, is described. In brief, the reaction consists of three phases: (a) formation of a bleb and membrane fusion, (b) disappearance of the longitudinally oriented fibrils, and (c) outward flaring and disappearance of the osmiophilic granule. The osmiophilic granule appears to consist of prism-like structures. The axial rod never lengthens during the acrosome reaction.
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Popham, J.D. The acrosome reaction in the sperm of the shipworm Bankia australis calman (Bivalvia, Mollusca). Cell Tissue Res. 151, 93–101 (1974). https://doi.org/10.1007/BF00222037
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DOI: https://doi.org/10.1007/BF00222037