Figure 6 in A high-resolution growth series of Tyrannosaurus rex obtained from multiple lines of evidence

Figure 6 Comparison of the frequency distributions of cranial and postcranial changes in the growth series of Tyrannosaurus rex. The growth stages are along the x-axis (corresponding to the numbered nodes of the ontogram in Fig. 2) and the y-axis corresponds to the number of synontomorphies. Cranial changes are shown in solid bars; postcranial chanages are shown in hollow bars. Cranial and postcranial changes tend to follow the same overall pattern although postcranial changes are exceeded by cranial changes, except at growth stages 7, 15, and 16. The relatively late occurrence of postcranial changes (at growth stage 6) is an artifact of the absence of postcranial material among the least mature specimens in the sample. Full-size DOI: 10.7717/peerj.9192/fig-6