Fig. 59
From: Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Spermiogenesis of Micropholcus fauroti. TEM. AÂ Mid spermatids, cross section. Note the chromatin condensation pattern and the helical band (arrow). BÂ Mid to late spermatid. Note the helical band of nuclear material on the surface of the prcN (arrows) and the short peN. CÂ Late spermatids, cross section. The nuclear canal shifts into the periphery of the prcN as soon as it meets the implantation fossa. DÂ Coiled spermatid. Note the electron dense content of the implantation fossa