Fig. 2: Tooth replacement and change of wear facet area in ornithopods.
From: Trophic evolution in ornithopod dinosaurs revealed by dental wear
a Left lower tooth row of the Late Jurassic Camptosaurus (YPM 1886) showing functional (ft1–ft5) and replacement (rt1–rt6) teeth, and the explanatory drawing of the different “Zahnreiche” with the light blue series passing through from replacement to functional teeth. Functional teeth have wear facets (green area). b Log10 values of the wear facet area vs log10 body mass in some non-ornithopod genasaurian (Othnielosaurus, Hypysilophodon, Thescelosaurus, with dark blue) and selected ornithopod taxa (with light blue) (Source data are provided as a Source Data file).
