Fig. 14 in A Possible Heptaxodontine and Other Caviidan Rodents from the Quaternary of Jamaica

Fig. 14. Left hemimandibles of three individuals of Cuban heteropsomyine Boromys torrei as seen in radiographs (A–C) and ordinary­light photographs (D–F, opposite page) in medial aspect. Specimens illustrate cheektooth wear stages discussed in text: (A, D) AMNHP 140812 representing stage 1, slight wear; (B, E) AMNHP 140811 representing stage 2, moderate wear; (C, F) AMNHP 140810 representing stage 3, advanced wear (see also fig. 15). (Ascending ramus of specimen depicted in C and F was lost during set­up for radiography). Arrows in D and E show migration of relative position of cervix as teeth wear down; in F, enamelodentine junction has been consumed by attrition and root material is exposed at occlusal surface. In radiographs of the oldest stage (C), the thickened roots overlap and thus appear solid, but the line of separation can still be seen in the photograph (F).