Creagrutus meridionalis (Fig. 8 A-K)

In the spermatozoon of Creagrutus meridionalis, the ovoid nucleus measures 1.5 µ m in the longitudinal axis and 1.13 µ m in the transverse axis. The surrounding strip of cytoplasm has no organelles (Fig. 8 A-C). Nuclear rotation toward the flagellar axis was about 75 degrees (Fig. 8A). The midpiece has a conical shape, measures about 1.47 µ m in length, and contains some slightly elongate mitochondria (Fig. 8 A-C). The endomembrane system is composed by vesicles with different sizes connected to clump of smaller vesicles with a lacy aspect (Fig. 8 D-K).