The double spermatogenesis in scutigera coleptratrata (Myriapoda, Chilopoda): macro-and Microspermaltocyte growth

Abstract

SummaryIn Scutigera coleoptrata, double spermatogenesis (macro and micro germinal cells) was reinvesti gted by means of both image analysis and electron microscopy. Image analysis of the cell-lines showed no differences in DNA content between the two types of spermatogesis.The only difference found, with the exception of the size and the related number of organelles, was that in the macro-cell line the chromatin was well dispersed and no condensed, which is the opposite of what was observed in the macro-cell line. It is asumed that the level of activity related to this condensation process is at the origin of the two pathways of development.