Figure 8 in Ontogeny and homology of the neural complex of otophysan Ostariophysi

Figure 8. Developmental stages of the anterior five neural arches and associated structures in two apteronotid Gymnotiformes. A–E, Apteronotus leptorhynchus. A, 9.0 mm. B, 10.6 mm. C, 10.8 mm. D, 11.2 mm. E, 11.9 mm. F–I, A. albifrons. F, 11.0 mm. G, 12.0 mm. H, 16.0 mm. I, same as in part H, in dorsal view and close-up, arrow points to incisure resulting from incomplete median fusion of supradorsals 4. J, 19.8 mm.