Measures of phylogenetic signal (estimated as K values) for venom and diet variation across the 8 taxa shown in Fig. 1.

P-value represents the probably that the observed value is greater then the expected value if trait values were randomly assigned to tip taxa. Trait names are as in Table 3 with the exception that PC 1 and 2– venom are the PC scores for composite venom variable and PC 1– diet are PC 1 scores for the composite diet variable. For venom, PC 1 and 2 explained 49% and 31% of total variation respectively, and had the following variable loadings (PC1 - DISI (−0.11); LAO (−0.36); CRISP (0.41); PLA2 (−0.88); SP (−0.12); SVMP (0.92); PEP (−0.42); PC2 - DISI (0.23); LAO (0.87); CRISP (0.64); PLA2 (−0.44); SP (0.72); SVMP (−0.33); PEP (0.12). For diet, PC 1 explained 87% of total variation and had the following loadings (% mammals (−0.95); % lizards (0.91).