Fig 3 in New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars

Fig 3. Schematic occlusal view of two left lower molars (m1–m2) of an ornithorhynchid monotreme (Obdurodon dicksoni) (A), and a pre−tribosphenic peramuran (Peramus sp.) (B). Note the difference between the "gaps" in A and the "embrasures" in B. In the former the intermolar contact results by mesial and distal cingulids. Not to scale.