Stamps depicting a set of dinosaurs excavated in Thailand. Set Year 1997 collection, 4 stamps per set.

Phuwiangosaurus Sirindhormae is a herbivorous dinosaur, walks 4 feet, length 15-20 meters, lived about 130 million years ago. At least six skeletons were found. in the Northeast Found for the first time in Phu Wiang District, Khon Kaen Province in 1982 ..Department of Mineral Resources Requesting a name to honor His Majesty.

Siamotyrannus Isanensus was a large carnivorous dinosaur, walking two feet, 6.5 meters long. 130 million years ago Found in Khon Kaen, Kalasin, Chaiyaphum, Sakon Nakhon, Udon Thani, Nakhon Ratchasima.

Siamosaurus Suteethorni is a large carnivorous dinosaur, walking on two feet, about 7 meters long. Lived about 130 million years ago.. Found in Khon Kaen, Kalasin, Chaiyaphum, Ubon Ratchathani, Sakon Nakhon, Udon Thani, Nakhon Ratchasima.

Psittacosaurus Sattayaraki is a small plant-eating dinosaur. Length of about 1 meter. Lives for about 100 million years ago, found in Chaiyaphum Province.