FIGURE 2 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 2. Classification and measurement of the teeth sampled here. 2A—Idealized drawings of heterodont phytosaur teeth following Hunt (1989; type C, U, I, B), Hungerbühler (2001; tip-of-snout, premaxillary, maxillary), and Datta et al. (2021; morphotypes IA, IB, IC, ID). 2B—Schematic of macro-morphological measurements taken on phytosaur teeth as preservation allowed. Measurements following the protocols of Smith (2005) with purple labels: CH—crown height, CBL—crown base length, AL—apical length, CA—crown angle (angle GAB), MA—mesial apical, MC—mesial mid-crown, and MB—mesial basal denticle densities, DA—distal apical, DC—distal mid-crown, and DB—distal basal denticle densities, with measurements new to this study in green: LAH—labial height, LIH—lingual height, and LLA— labio-lingual angle.