FIGURE 5 in Tooth enamel microstructure in North American Phytosauria (Diapsida:Archosauriformes): Implications for biogeography and ecology of a Late Triassic clade of crocodylian-like predators

FIGURE 5. SEM captures of Smilosuchus teeth from the lower Chinle of New Mexico (4.1–2) and Arizona (4.3–6). 5A—NMMNH P-36146 type U tooth with well-developed columns; 5B—NMMNH P-36148 type B tooth in longitudinal view along the carina with faint LIGs in the inner half of the enamel; 5C—NMMNH 59648 type U tooth overview of transverse section showing the contributions of enamel and dentine to the fluting; 5D—NMMNH P-59648 type U tooth fluting along lingual surface; 5E—NMMNH P-59650 type B tooth along labial margin of enamel with well-developed columns; 5F—NMMNH P-59650 type B tooth along lingual margin of enamel. Scale bars for 5.1, 5.4–6 equal 50 µm, 5.2 scale bar equals 100 µm and 5.3 scale bar equals 2 mm.