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. 2014 Feb 25;5:74. doi: 10.3389/fphys.2014.00074

Figure 3.

Figure 3

Tooth crest formation and the epithelial bulge. Frontal sections through reptilian teeth as they develop from cap to bell stage and final differentiation. (A–E) Unicuspid snake, Python molurus. No bulge is found in the inner enamel epithelium. (F–J) Bicuspid gecko Paroedura picta. A bulge is found in the central part of the inner enamel epithelium. See arrow in (G). (K–O) Lingual-labial crest formation in the central cusp of the chameleon, Chamaeleo calyptratus. (P–T) Lingual-labial crest formation in the central cusp of the anole. Anolis allisoni. A bulge is found in the inner enamel epithelium in both species. See arrow in (L,S). Scale bar = 50 μm.