Orthipods, like titanosaurs, had a worldwide distribution during the middle to late Cretaceous period. The importance of Siamodon is that it's one of the few dinosaurs to be discovered in modern-day Thailand (a country that used to be known as Siam)--and, like its close cousin Probactrosaurus it lay close to the evolutionary juncture when the first true hadrosaurs branched off from their ornithopod forebears. To date, Siamodon is known from only a single tooth and a fossilized braincase; further discoveries should shed additional light on its appearance and lifestyle. You are searching for a regular jug at a log.