Fig. 27
From: Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Spermiogenesis of Physocyclus globosus. TEM. A Early to mid spermatid. B Late spermatid. Note the dense chromatin condensation and the elongated peN. C Late spermatid, detail. The AV is slightly extending into the anterior pole of the nucleus and is flanked by electron dense “organizational centers” (arrows). D Coiled spermatid. Note that the chromatin condensation in this state is notably more heterogenous than in earlier stages of spermiogenesis