Fig. 69
From: Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Spermiogenesis and cleistosperm of Spermophora senoculata. TEM. A Early to mid spermatid. Note the depth of the IF and the electron dense plate besides the prcN (arrow). BÂ Mid to late spermatid, longitudinal section. Note the presence of a helical band of nuclear material along the prcN (arrow) and the IF filled with glycogen. CÂ Coiled spermatid. Note the peripheral position of the NC along the peN. DÂ Cleistosperm in the lumen of the deferent duct. The helical band is still present at this stage (arrow)