Skull and mandibular details of Gavialis cf. bengawanicus (DMR-KS-201202-1) from the Early Pleistocene of Khok Sung (Nakhon Ratchasima Province, Thailand).

A, premaxillary toothrow in left oblique view. The arrows follow the premaxillary-maxillary suture. B, left lateral view of the pterygoid bullae through the orbit. C, lateral oblique view of the left posterior mandibular tooth row. The arrow points to the anterior process of the surangular. D, left lateral view of the posterior portion of the mandible. The arrow points to the descending process of the surangular along the posterior corner of the external mandibular fenestra. Abbreviations: an, angular; br, basisphenoid rostrum; den, dentary; emf, external mandibular fenestra; pa, palatine; ptb, pterygoid bulla; san, surangular; sp, splenial; s.san, suture for surangular.