Fig. 5. A in New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus

Fig. 5. A suite of traces in the rhynchosaurid archosauromorph Hyperodapedon mariensis (Tupi Caldas, 1933), UFRGS-PV-1581-T #14, bone fragment from Buriol Site, Brazil, Hyperodapedon AZ, Carnian. A. Two feeding traces of Osteocallis mandibulus Roberts et al., 2007, overlapped by a cluster of larger grooves. B. Natural cast formed by a cover of iron oxide showing the grooves in positive relief. Image mirrored to facilitate comparison. C, D. Clusters of grooves on different surfaces of the same bone fragment. E. Small Osteocallis mandibulus close to the trails shown in A and B.