Figure 1. A in Sculpture and vascularization of dermal bones, and the implications for the physiology of basal tetrapods

Figure 1. A, Mastodonsaurus giganteus (Stereospondyli, Capitosauroidea), SMNS without number. Parietals showing polygonal sculpture in the ossification centre and radial sculpture in the periphery. B, Gerrothorax pustuloglomeratus (Stereospondyli, Plagiosauridae), SMNS without number. SEM photograph of dorsal osteoderm showing tubercular sculpture. C, Metoposaurus fraasi (Stereospondyli, Trematosauroidea), UCMP 27103. Close-up of the regular polygonal sculpture on the parietal. D, Wetlugasaurus samarensis (Stereospondyli, Trematosauroidea), PIN 4627/1. Close-up of polygonal sculpture on the parietal; the nodal points are elevated with respect to the sculptural ridges. For abbreviations, see text.