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sharp-clawed runner
Segnosaurus
Say it like this: “SEG-no-SAWR-us”
Segnosaurus galbinensis
Segnosaurus ate plants and walked on two legs. It lived in the Late Cretaceous. Bones have been found in Mongolia.
- When
- Late Cretaceous (Cenomanian · Turonian) · roughly 100.5 to 89.8 million years ago
- Named in
- 1979 · Perle, A.
- Hip height
- 1.6 m · 5 ft
- Length
- 6–7 m · 20–23 ft
- Weight
- 1.3 tonnes
- Found in
- Mongolia · Bayanshiree
- Food and walking
- Herbivore · Two legs
- Kind
- sharp-clawed runner · Theropod
- Family branch
- Therizinosauridae
The story in short
Segnosaurus was formally named in 1979 by A. Perle. The name means “slow lizard.”
It lived in the Late Cretaceous (Cenomanian · Turonian), roughly 100.5 to 89.8 million years ago. Finds come from Mongolia, including the Bayanshiree Formation. It was a herbivore and walked on two legs.
Published estimates put Segnosaurus at a length near 6–7 m, hips about 1.6 m high, and a body mass around 1.3 tonnes.
On the family tree it sits in Therizinosauridae, among the theropod dinosaurs.
Close relatives
Duonychus
Duonychus tsogtbaatari
Late Cretaceous (Cenomanian–Santonian) · roughly 100.5 to 83.6 million years ago
Erlikosaurus
Erlikosaurus andrewsi
Late Cretaceous (Turonian · Coniacian · Santonian) · roughly 93.9 to 83.6 million years ago
Nanshiungosaurus
Nanshiungosaurus brevispinus
Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago