Isolated Thai iguanodontian teeth; Sirindhorna khoratensis maxillary tooth (A, B. NRRU-A1959) and dentary tooth (G, H. NRRU3001-28); Siamodon nomngami maxillary tooth (C, D. PRC-5) and dentary tooth (I, J. WNM-Sp-001); Khok Pha Suam iguanodontian maxillary tooth (E, F. SM2021-1-122) and dentary tooth (K, L. SM2021-1-121). In labial (A, C, E), mesial (B, D, F), lingual (G, I, K), and distal (H, J, L) views. Abbreviations: ar; accessory ridges, pr; primary ridge, sr; secondary ridge. Scale bars: 0.5 cm (Modified from Buffetaut and Suteethorn (2011); Shibata et al. (2015); Manitkoon et al. (2022)).