Fig. 17
From: Evolutionary morphology of sperm in pholcid spiders (Pholcidae, Synspermiata)
Spermiogenesis of Kambiwa neotropica. TEM. A, B Early spermatid. Note the localized accumulation of mitochondria. C Mid spermatid. The mitochondria concentrate at the anterior pole of the spermatid. D Mid to late spermatid. E Late spermatid, cross section. F Late spermatids before coiling. The mitochondria are less localized but distributed through the cytoplasm