Fig. 7 in Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae)

Fig. 7. Spermatozoa of Ceratobranchia obtusirostris. A-B: Longitudinal sections of spermatozoa. Note the lateral position of the nucleus (n) in relation to the flagellar axis and to proximal (p) and distal (d) centrioles,, the eccentric position of the double nuclear fossa (double arrow), the midpiece containing the endomembrane system (v) and the cytoplasmic canal (*) containing the initial segment of the flagellum (f). C-D: Cross sections at different levels of the nucleus (n) exposing the lateral position of the cytoplasmic canal (*) and flagellum (f), the distribution of the few elongate mitochondria (m) accumulated in larger portion of the midpiece.Published as part of Baicere-Silva, Clarianna Martins, Ferreira, Katiane M., Malabarba, Luiz R., Benine, Ricardo C. & Quagio-Grassiotto, Irani, 2011, Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae), pp. 377-392 in Neotropical Ichthyology 9 (2) on page 385, DOI: 10.1590/S1679-62252011005000014, http://zenodo.org/record/542277