Fig. 4

Phylogenetic patterns of variation in ontogenetic allometric trajectories and heterochrony in Paleoanguimorpha. Each grid is a square matrix where cells represent a pairwise comparison between species (diagonal in black). The phylogenetic tree depicting interspecific relationships is shown in the axes. Squares with colored borders indicate comparisons within clades (colors follow Fig. 3). White cells indicate comparisons that were not performed and blue cells represent negative results. Orange cells in the top row of grids indicate species pairs that differ significantly in trajectory length (upper triangle) or trajectory slope (lower triangle). Orange cells in the middle row indicate species pairs that have a common slope but differ significantly in intercept (upper triangle) or pairs that have a common slope and intercept but different adult shape, suggesting peramorphosis/paedomorphosis (lower triangle). In the upper triangle of the bottom row, orange cells indicate species pairs that overlap in shape and size-shape space, suggesting heterochrony by ontogenetic scaling. In the lower triangle, orange cells indicate species pairs that overlap in shape space but not in size-shape space, suggesting heterochrony by size-shape dissociation