Fig. 5 in Comparative analysis of spermiogenesis and sperm ultrastructure in Callichthyidae (Teleostei: Ostariophysi: Siluriformes)

Fig. 5. Spermatozoa of Scleromystax lacerdai. a) Spermatozoon longitudinal section. b and c) Nucleus in longitudinal and cross sections. d) Detail of centriolar arrangement. e to g) Midpiece in longitudinal and transverse sections showing mitochondria and vesicles. h) Flagellum in longitudinal section. h-inset) Flagellum in cross section. (a, d, e) X23000; (b, c) X 17000; (f) X25200; (g) X 20400; (h) X 42000; (h-inset) X 32200. B: basal body; D: distal centriole; E: electron-dense structure; F: flagellum; N: nucleus; P: proximal centriole; V: vesicles; Asterisk: mitochondria, Arrow: cytoplasmic channel; Arrowhead: lateral membranous compartment; Double arrowhead: electron-dense material between the centrioles; Lozenge: electron-dense circular structure.