Argentophilic structures of spermatogenesis in the yellow fever mosquito

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Abstract
Application of the silver-staining technique to air-dried chromosome preparations of the yellow fever mosquito, Aedes aegyptl, revealed the following: 1) Intensely stained perlcentromeric regions in all chromosomes including the Y chromosome in spermatogonla, and during the primary and secondary spermatocytes; 2) the presence of prepachytene that were not reported earlier; 3) a nucleolus organizing region that persisted up to the late pachytene stage; and 4) rod or ring-like centrioles in pachytene and diplotene stages. In addition, varying numbers (1–4) of silver-stained, ring-like structures were observed during spermiogenesis. The exact nature and function of these ring-like structures is not understood.