Figure 8 in Sculpture and vascularization of dermal bones, and the implications for the physiology of basal tetrapods

Figure 8. Principal component analysis of 47 taxa of basal tetrapods based on the 12 characters defined in Appendix 2 (nominal data). The convex hulls cover taxa with the same presumed life habit. The criteria for the presumed life habit of each taxon plus references are listed in Appendix 4.