Fig. 6. Ecomorphological analysis of presacral vertebra shapes excluding aquatic taxa and selecting vertebrae by position.

A Vertebrae significantly associated with a given ecological category (1, arboreal; 2, fossorial; 3, cursorial; 4, terrestrial). The significance of R² (grey-colour squares) for each vertebra is indicated by frame thickness; thick frames p values <0.01; thin frames p values <0.05; absence of frame indicates p values >0.05. B Three-dimensional models obtained from phylogenetic Procrustes ANOVAs showing for each for each significant association of “vertebra-ecology” the morphological deviation from the corresponding shape for a given ecology (red) to the vertebral shape of the rest of the sample (blue). C Quantification of the morphological deviation obtained from the three-dimensional models represented in (B) showing the vertebrae that experience most of the changes in shape. Dotted line represents morphological deviations for arboreality, dashed line for cursoriality, and bold line for fossoriality.