Ratchasimasaurus

Norman, David B., 2015, On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna), Zoological Journal of the Linnean Society 173 (1), pp. 92-189 : 152

RATCHASIMASAURUS SURANAREAE SHIBATA, JINTASKUL & AZUMA, 2011

This taxon comprises an isolated, toothless, left dentary collected from Khok Kruat Subdistrict, Muang Hakhon Ratchasima, Nakhon Ratchasima Province, northeast Thailand (Khok Kruat Formation: Aptian). It was diagnosed on the basis of its elongate and dorsoventrally shallow dentary ramus. This specimen displays the crown-shaped impressions in the replacement channels exposed in the medial view of the lateral alveolar wall (Norman, 2002); it also displays a low and oblique, but notably anteroposteriorly expanded, coronoid process. The lower and more elongate form of the dentary ramus, the lower and transversely expanded symphyseal region, and unusually thickened coronoid process distinguish this material from the dentary elements referred to Hy. fittoni .

Taxonomic note

See Siamodon (above).