Figure 4. Polychrus charisticus sp. nov., (1) Illustration and (2) photograph of holotype, partial right maxilla in lateral view (PTRM 1841). (3) Paratype, premaxillary process of a right maxilla in dorsolateral view (PTRM 5373). Anterior to right. Note lip overhanging the lateral margin. (4) Illustration and (5) photograph of paratype, edentulous right dentary in medial view (PTRM 5351). The AIAF is represented by the notch at the posterior margin of the medial face of the dentary. The anterior-most one or two teeth are not discernible in this view. The specimen has subsequently been damaged. (6) Right maxilla of extant Polychrus marmoratus in lateral view (YPM R13556). Scale bars equal 1 mm.