Figure 6 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 6. Lateral and medial view of the five genera of the mandibles extant cheloniid sea turtles. Images are of surface files constructed in Avizo lite 8.0. A, Natator depressus (WAM R112123). B, Chelonia mydas (NHMUK 1969.776). C, Eretmochelys imbricata (WAM R120113). D, Lepidochelys olivacea (SMNS 11070). E, Caretta caretta (SAM unregistered). Abbreviations: ANG, angular; ART, articular; COR, coranoid; DEN, dentary; for.dent.maj, foramen dento faciale majus; fs.mk, fossa Makelii; lb.rid, labial ridge; lin.ridge; lingual ridge; mek.gro, Meckelian groove; PRA, prearticular; SUR, surangular. Scale bar = 50mm.