FIGURE 3 in The first fossil skull of Chelus (Pleurodira: Chelidae, Matamata turtle) from the early Miocene of Colombia

FIGURE 3. CT images of Chelus sp. MUN-STRI-dbid 38473. 1, skull in dorsal view, arrows indicate the position of the cuts shown in 4-7. 2, horizontal cut on the lower portion of the skull, anterior to the foramen magnum. 3, horizontal cut at the level of the widest portion of the skull. 4, sagittal cut on the left portion of the skull. 5, sagittal cut at the midline of the skull. 6, coronal cut very close to the level of the basisphenoid-basioccipital contact. 7, coronal cut on the anterior portion of the skull. Abbreviations are as in Figure 2, plus apb (anterior process of basisphenoid).