Fig. 5

Phyloallomspace of Paleoanguimorpha. Axes correspond to the first two principal components (PCs) of the slopes of the ontogenetic allometric trajectories. The phylogenetic tree and inferred ancestral conditions (nodes) are shown in light gray. Convex hulls are shown for each clade. For the linear measurements, we show next to each axis the trait whose slope contributes majorly to each PC and how it changes ontogenetically at the lower and upper extremes (separated by dash, in that order). For head shape, we show below the average landmark configuration of juveniles (arrow origins) of the species at the extremes of each axis and how landmarks move as each species grows (arrow ends)