Figure 4. A in Enamel microstructure evolution in anthracotheres (Mammalia, Cetartiodactyla) and new insights on hippopotamoid phylogeny

Figure 4. A, Elomeryx borbonicus, vertical section of upper molar, showing the bent Hunter–Schreger bands (HSBs). B, Brachyodus onoideus, vertical section of upper molar, showing the bent and regular HSBs. C, Brachyodus onoideus, detail of the interprismatic matrix (IPM) in closed coats then in inter-row sheets near the EDJ. D, Merycopotamus medioximus, vertical section of upper molar showing the bent and blurry HSBs and the thick radial enamel of the outer third of the enamel thickness. E, Sivameryx palaeindicus, vertical section of lower molar showing the lack of HSBs, the inclination of prisms and the IPM in inter-row sheets near the enamel–dentine junction (EDJ). F, Merycopotamus nanus, IPM forming inter-row sheet on the horizontal section of upper molar. G, Libycosaurus bahri, vertical section of upper molar, showing the lack of HSBs and the inclination of prisms at the EDJ.