Figure 4.

Reduced-major axis regressions of feeding morphology traits and standard length in Roeboides affinis, and Charax cf. pauciradiatus over ontogeny. (a) Tooth aspect ratio, (b) anterior mechanical advantage, (c) posterior mechanical advantage, (d) occlusional offset, (e) jaw length, (f) jaw adductor cross-sectional area, (g) second moment of area at the jaw joint (0%), (h) second moment of area at the jaw symphysis (90%). The dotted lines indicate theoretical isometric growth. Boxes represent the scaling pattern displayed by each species: N = negative allometry, P = positive allometry, I = isometric growth. Scale-feeders are outlined in red, their non-lepidophagous relatives outlined in blue.