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sharp-clawed runner · Doubtful name
Siamosaurus
Say it like this: “sie-AM-o-SAWR-us”
Siamosaurus suteethorni
Siamosaurus ate meat and walked on two legs. It lived in the Early Cretaceous. Bones have been found in Thailand.
- When
- Early Cretaceous (Valanginian · Hauterivian) · roughly 137.1 to 125.8 million years ago
- Named in
- 1986 · Buffetaut, E.; Ingavat, R.
- Hip height
- 1.4 m · 5 ft
- Length
- 5.1–9.1 m · 17–30 ft
- Weight
- 0.3–1 tonnes
- Found in
- Thailand · Sao Khua
- Food and walking
- Carnivore · Two legs
- Kind
- sharp-clawed runner · Theropod
- Family branch
- Spinosauridae
The story in short
In 1986, E. Buffetaut and R. Ingavat published the name Siamosaurus. The name means “siam lizard.”
Fossils referred to Siamosaurus date to the Early Cretaceous (Valanginian · Hauterivian), roughly 137.1 to 125.8 million years ago. Finds come from Thailand, including the Sao Khua Formation. It was a carnivore and walked on two legs.
Published estimates put Siamosaurus at a length near 5.1–9.1 m, hips about 1.4 m high, and a body mass around 0.3–1 tonnes.
On the family tree it sits in Spinosauridae, among the theropod dinosaurs.
Close relatives
Camarillasaurus
Camarillasaurus cirugedae
Early Cretaceous (Barremian) · roughly 125.8 to 121.4 million years ago
Iberospinus
Iberospinus natarioi
Early Cretaceous (Barremian) · roughly 125.8 to 121.4 million years ago
Riojavenatrix
Riojavenatrix lacustris
Early Cretaceous (Aptian) · roughly 121.4 to 113.2 million years ago