Figure 34 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)

Figure 34. Abdominal region of Notopteridae. A, Abdominal region of Chitala sp. (UMA F10341, 75 mm SL), showing several features characteristic of the family Notopteridae. Note particularly the abdominal scutes, abdominal ribs, elongate second and third true ribs (perhaps abdominal ribs and true ribs that have fused), anal scutes and an enlarged proximal radial of the first anal pterygiophore. The abdominal ribs develop like true ribs and may fuse to the true ribs; the autogenous abdominal ribs are marked with arrows. There is a small cartilaginous element that is developed posterior to the last ossified abdominal rib, which likely is the fifth autogenous abdominal rib. B, close-up of pelvic fin region showing details of the pelvic girdle, abdominal scutes and the proximal radial of the first anal pterygiophore. Note that the abdominal and anal scutes are both paired structures.