Fig. 4
From: Subfamily hypostominae: similarities and differences in testicular structure of amazonian fish
Photomicrography of sperm in the tubule lumen. a-e H. zebra: a Sperm immersed in secretion (*); b schematic design of sperm; c detail of the flagellum showing lateral projections (arrowhead) by SEM; d and e detail of the cross-section of the flagellum showing the lateral projections(arrowhead). f B. xanthellus g P. oligospila. Detail of the cross-section of the flagellum in both species. Scale bar: SEM- a: 2 μm, c: 3 μm; TEM- d,e: 1 μm