Fig. 4
From: New records of nautiloid and ammonoid cephalopod fossils in peninsular Thailand
a–c Ussuria sp. A; PRC-SHM-KO-020, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, a lateral view, b cross section, c ceratitic suture; d, e Ussuria sp. indet.; PRC-SHM-KO-272, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, d lateral view, e cross section; f, g Bosnites clathratus Hyatt and Smith, 1879; PRC-SHM-KO-035, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, f lateral view, g cross section; h, i Paracrochordiceras sp. indet.; PRC-SHM-KO-054, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, h lateral view, i cross section; j–l Kellnerites bosnensis (Hauer, 1888); PRC-SHM-KO-022, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, j lateral view of juvenile, k cross section, l ceratitic suture; m, n Halilucites sp. A; PRC-SHM-KO-376, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, m lateral view, n cross section; o, p Halilucites sp. B; PSUNHM-2197-505-012, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, m lateral view, n cross section