Fig. 36

Spermiogenesis and cleistospermia of Mesabolivar spp. TEM. A Early spermatid of M. iguazu, with a globular chromatin condensation pattern. B Mid to late spermatid of M. cyaneotaeniatus. Note the heterogenous chromatin condensation within the nucleus as well as the electron dense material in the direct surroundings of the proximal centriole. C Late spermatid of M. iguazu. The centriolar adjunct material consists of short lamellae, which begin to develop at this stage. D Early cleistosperm of M. iguazu, showing the long, layered lamellae of the centriolar adjunct material along the anterior part of the axoneme. E Coiled spermatid of M. iguazu. Note that the number of lamellae of the centriolar adjunct material correspond with the amount of microtubule doublets of the axoneme