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sharp-clawed runner
Siamotyrannus
Say it like this: “sie-AM-o-ti-RAN-us”
Siamotyrannus isanensis
Siamotyrannus 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
- 1996 · Buffetaut, E.; Suteethorn, V.; Tong, H.
- Hip height
- 2.5 m · 8 ft
- Length
- 6–10 m · 20–33 ft
- Weight
- 0.5–1.8 tonnes
- Found in
- Thailand · Sao Khua
- Food and walking
- Carnivore · Two legs
- Kind
- sharp-clawed runner · Theropod
- Family branch
- Metriacanthosaurinae
The story in short
In 1996, E. Buffetaut and colleagues published the name Siamotyrannus. The name means “siamese tyrant.”
It lived in 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 Siamotyrannus at a length near 6–10 m, hips about 2.5 m high, and a body mass around 0.5–1.8 tonnes.
On the family tree it sits in Metriacanthosaurinae, among the theropod dinosaurs.