Figure 11 in Redescription of the skull of the Australian flatback sea turtle, Natator depressus, provides new morphological evidence for phylogenetic relationships among sea turtles (Chelonioidea)

Figure 11. Antero-medial view of braincase of Natator depressus (WAM R112123) (A) and Lepidochelys olivacea (SAMA BM670) (B) illustrating the two states of the rostrum basisphenoidale, robust (A) and gracile (B). Displaying the states of character 4 based on the descriptor in the Appendix. Abbreviations: pro.ros.nas processus rostrum basisphenoidale; ros.bas, rostrum basisphenoidale. Scale bars = 20mm.