Knodus meridae (Fig. 11 A-E)

In the spermatozoon of Knodus meridae, the ovoid nucleus measures 1.3 µ m in the longitudinal axis and 1.1 µ m in the transverse axis. The surrounding strip of cytoplasm has no organelles (Fig. 11 A-D). Nuclear rotation toward the flagellar axis was about 75 degrees (Fig. 11A). The midpiece has a rhomboid shape, measures about 0.9 µ m in length and contains some elongated mitochondria and vesicles (Fig. 11 A-E). Information on the organization of the endomembrane system is not available, since the specimens of K. meridae have been obtained from ichthyological collections and the gonads were not appropriately preserved for ultrastructural analysis.