Table 3. Pairwise head shape comparisons among ancestral character states within the Western Rattlesnake (Crotalus viridis) complex.

Distances compiled among ancestral character states are provided for comparisons. Numbers refer to ancestral nodes in the phylogeny (Fig 4)

	10	11	12	13	14	15	16	17
10
11	0.0058
12	0.0057	0.0115
13	0.0048	0.0104	0.0024
14	0.0036	0.0086	0.0043	0.0030
15	0.0059	0.0086	0.0081	0.0072	0.0045
16	0.0035	0.0087	0.0040	0.0025	0.0020	0.0062
17	0.0037	0.0070	0.0069	0.0051	0.0039	0.0063	0.0035