FIGURE 40. Prothomomys warrenensis n. gen. n. sp. A: occlusal view of holotype P₄ (UCMP 320186), B: lateral view of same P₄ (UCMP 320186), C: Lateral view of paratype M¹ (UCMP 320188), D: occlusal view of same M¹ (UCMP 320188). SEM image. Scale equals 0.1 mm.