Figure 5. A in Enamel microstructure evolution in anthracotheres (Mammalia, Cetartiodactyla) and new insights on hippopotamoid phylogeny

Figure 5. A, Kenyapotamus coryndonae, vertical section of upper molar, showing the bent and regular Hunter– Schreger bands (HSBs) throughout the enamel thickness. B, Kenyapotamus coryndonae, horizontal section, showing the several synchronous prism undulations. C, Saotherium mingoz, inner part of enamel thickness of vertical section of upper molar, showing radial enamel with inclined prisms in regard of the enamel–dentine junction (EDJ). D, Hexaprotodon garyam, vertical section of upper molar, showing the bent and blurry HSBs and the development of inner and outer radial enamel. E, Hippopotamus amphibius, detail of the inner radial enamel, showing modified radial enamel. F, Hippopotamus antiquus, vertical section of upper molar showing the bent HSBs throughout the thick enamel.