Figure 4.

Neurocranial ontogenetic trajectories for predicted shape vs. log‐centroid size. (a) Neurocranial ontogenetic trajectories of 17 gymnotiform species showing the diversity in allometric slopes between species. Procrustes ANOVA for homogeneity of slopes test indicate significant (p = 0.001) differences between allometric slope angles. (b) Ontogenetic trajectories of 10 brachycephalic (PC1 < 0.00) species showing the diversity of allometric slopes between species with similar degrees of heterocephaly. Procrustes ANOVA for homogeneity of slopes test indicate significant (p = 0.001) differences between allometric slopes. (c) Ontogenetic trajectories of six dolichocephalic (PC1 > 0.00) species showing more similarity in slopes between species. Procrustes ANOVA for homogeneity of slopes test indicate significant (p = 0.001) differences between allometric slopes within this group of species