Figure 7. A in Sculpture and vascularization of dermal bones, and the implications for the physiology of basal tetrapods

Figure 7. A, the oblique growth of nodal points and ridges as indicated in Figure 6H can be shown histologically. The growth marks indicate oblique appositional growth, and the arrow shows the direction of growth. B, Chroniosaurus dongusensis (Chroniosuchia, Chroniosuchidae), PIN 3585/124, juvenile specimen. The sculpture on the skull table consists primarily of radially aligned ridges, with very few tubercles. C, skull table of an ontogenetically advanced Chroniosaurus dongusensis, PIN 3713/11. The ridges bear numerous distinct tubercles. D, Ventastega curonica (stem tetrapod), PIN 54/180. Fragment of angular with deep, steep-walled lateral line sulcus that is partially enclosed within the bone. E, Cheliderpeton latirostre (Stereospondylomorpha, Intasuchidae), SMNS 91003. Posterior part of the skull with faintly impressed lateral line sulci posterior and medial to the orbits. F, Metoposaurus fraasi (Stereospondyli, Trematosauroidea), UCMP 27103. Prefrontal bearing a broad lateral line sulcus. For abbreviations, see text.