Fig. 54

Spermiogenesis and cleistosperm in Cantikus sabah. TEM. A Early spermatid. The nuclear canal is running in the periphery of the nucleus. B Mid spermatid, cross-section. Note the developing helical band of nuclear material (arrow). C Mid to late spermatid, longitudinal section. Note the deep implantation fossa. D Mid to late spermatid, longitudinal section. The proximal centriole is notably elongated. E Cleistosperm in the lumen of the deferent duct. The helical band of nuclear material is also present after coiling (arrow)