Siamosaurus

Siam lizard

• Siam · English/historical · Siam (historic name for Thailand)
• sauros · Greek · lizard

The name combines "Siam," the historical name for Thailand, with the Greek word "sauros," meaning "lizard." It was named in reference to the country where its fossils were discovered. The name essentially means "Siamese lizard" or "lizard from Siam," honoring the Thai origin of the specimen.

Named by

Buffetaut and Ingavat

Year named

1986

Period

Early Cretaceous

Stages

Barremian – Aptian

Found in

Sao Khua Formation, Khon Kaen Province, Thailand

Siamosaurus is a large spinosaurid theropod dinosaur known primarily from isolated teeth. Because it is based only on teeth — which are difficult to distinguish from those of other spinosaurids — many researchers consider it a nomen dubium. Some studies have suggested its teeth are indistinguishable from those of Spinosaurus or other spinosaurids, casting doubt on its validity as a distinct genus.