Fig. 2
From: New records of nautiloid and ammonoid cephalopod fossils in peninsular Thailand
a, b Michelinoceras sp. A; PRC-SHM-KO-121, Chaiburi Formation, Triassic, 7°37′N, 100º5′E, lateral view; c–h Tienoceras sp. A; PRC-SHM-KO-151, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, c, d dorsal view, e anterior cross section, f posterior cross section, g, h ventral view; i–j Sactorthoceras banestanensis Evan, 2006; ISS-LN-ST-024, Pa Kae Formation, Ordovician, 6°58′N, 99°46′E, lateral view; k, l Madiganella magna Teichert and Glenister, 1952; PRC-SHM-KPC-002, Rung Nok Formation, Ordovician, 8°09′N, 99°51′E, lateral view; m, n Syringoceras barrandei (Hauer, 1847); PRC-SHM-KO-056, Chaiburi Formation, Triassic, 7°37′N, 100°5′E, m lateral view, n rectangular cross section; o, p Javavionautilus heterophyllus (Hauer, 1849); PRC-SHM-KO-055, Chaiburi Formation, Triassic, 7º37′N, 100º5′E, o lateral view, p cross section with acute venter