Fig. 6 in Enamel microstructure of permanent and deciduous teeth of a species of notoungulate Toxodon: Development, functional, and evolutionary implications

Fig. 6. Diagrammatic representation indicating microstructural variation of enamel in upper permanent molar (A, B) and lower permanent premolar (C) and molar (D–K) of Toxodon sp. A, B. M3. C. p4. D–K. m1–2. Symbols represent different percentages of enamel zones from the enamel-dentine junction EDJ) up to the outer enamel surface. A. Ectoloph (mesial distal). B. Anterior fold (distal). C. Buccal enamel. D. Hypoconulid. E. Meta-entoconid fold mesial loop close to internal portion of fold). F. Meta-entoconid fold (distal loop close to internal portion of fold). G. Ento-hypoconulid fold (mesial loop). Illustration based on Lindenau (2005). H. Ento-hypoconulid fold (distal loop). I. Meta-entoconid fold (distal loop). J. Meta-entoconid fold (innermost area of the distal loop). K. Meta-entoconid fold (internal portion).