Table 1.

The loadings of component measures of ectodermal bone on the first (“armour PC”) principal component. All component measures included in the PCA were residuals from the simple regression of the trait on body size (standard length), except number of lateral plates

Trait	PC1 loading
First dorsal spine	0.371
Second dorsal spine	0.418
Left pelvic spine	0.407
Height of pelvic process	0.414
Length of pelvis	0.389
Number of lateral plates	0.226
Lateral plate height	0.385