Supplementary material S3 - Figures S1-S4 from The morphology of the inner ear of squamate reptiles and its bearing on the origin of snakes

Figure S1, two phylogenies inclusive of fossil taxa that were used in this study; Figure S2, accuracy test of landmarking procedure; Figure S3, distribution of variance of the principal components; Figure S4, distribution of variance for the first 10 phylogenetic principal components derived from both phylogenies adopted (i.e. with Dinilysia as a stem alethinophidian and as a stem ophidian).