Existence d'un complexe acrosomal chez les spermatozoïdes du cnidaireMuggiaea kochi(Siphonophore, Calycophore): différenciation et réaction acrosomale / Existence of an acrosomal complex in the spermatozoids of the cnidarianMuggiaea kochi(Siphonophora, Calycophora): differentiation and acrosomal reaction

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Abstract
The present investigation of Muggiaea kochi (Siphonophore, Calycophore) describes for the first time an acrosomal complex in a cnidarian. The acrosomal reaction is always observed in spermatozoa swimming around the maturation pole of the egg where the fertilization takes place exclusively. After this reaction the spermatozoa exhibit an anterior process at the end of which the fusion with the egg membrane occurs. This acrosomal process has a long striated rod differentiated from the pericentriolar apparatus during spermiogenesis.

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