Bryconamericus exodon (Fig. 6 A-L)

In the spermatozoon of Bryconamericus exodon the ovoid nucleus measures 1.5 µ m in the longitudinal axis and 1.2 µ m in the transverse axis. The surrounding strip of cytoplasm has no organelles (Fig. 6A). Nuclear rotation toward the flagellar axis was about 80 degrees (Fig. 6 A-B). The midpiece has a conical shape, measures about 1.17 µ m in length and contains some slightly elongate mitochondria (Fig. 6 A-E).The endomembrane system is composed by vesicles with different sizes connected to clump of smaller vesicles with a lacy aspect (Fig. 6 F-L).