Fig. 5 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 5. Ontogenetic changes in the second ural centrum of Aspredinidae. A. Pterobunocephalus sp. (MZUSP 57208, approx. 5.5 mm SL), late embryo inside eggshell, B. Pterobunocephalus sp. (MZUSP uncat., 63.0 mm SL), adult. Heavy stippling represents cartilage, light stipling represents a thin mineralized layer, and open areas represent notochord (in A) or bone (in B). Scale bars = 0.5 mm (A) and 1 mm (B).