Fig. 6

a–c Hungarites sp. A; PRC-SHM-KO-078, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, a lateral view, b cross section, c ceratitic suture; d–f Aplococeras parrus (Smith, 1914); PRC-SHM-KO-027, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, d lateral view, e cross section, f ceratitic suture; g, h Indoceltites trigonalis (Diener, 1908); PRC-SHM-KO-264, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, g lateral view, h cross section.; i, j Audaxlytoceras audax Meneghini, 1881; PRC-SHM-KO-048, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, i lateral view, j cross section; k, l Protetragonites sp. A; PRC-87, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, k lateral view, l cross section