Figure 36 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)

Figure 36. Caudal skeleton of a large juvenile and an adult Arapaima gigas. A, photograph and B, line drawing of an estimated 780 mm SL specimen (FMNH 85741). C, photograph and D, line drawing of an estimated 1270 mm SL specimen (UMA F11263). Fin rays dissected away in C & D; fin rays omitted from drawings. Note that in FMNH 85741 (A & B), the fusion of the uroneural to hypural 6 is very nearly complete; these elements are completely fused in UMA F11263 (C & D). Also note the double haemal arches and likely double (although fused) neural arches on pu2 in FMNH 85741 (A & B). Anterior facing left.