- Length
- 4 m
- Diet
- Meat-eater
- When
- Late Cretaceous97 to 88 million years ago
- Fossils found in
- Mongolia
- Named by
- Perle (1979)
- Family tree
- Dinosauria › Saurischia › Theropoda › Therizinosauroidea › Therizinosauridae
Large theropods. Big two-legged meat-eaters, such as Tyrannosaurus. See all 63
Lived at the same time
- Achillobator · same country
- Graciliceratops · same country
- Tsagantegia · same country
- Erlikosaurus · same country
- Garudimimus · same country
- Talarurus · same country
- Alectrosaurus · same country
- Gigantoraptor · same country
Other large theropods
- Gigantoraptor Late Cretaceous
- Achillobator Late Cretaceous
- Carcharodontosaurus Late Cretaceous
- Deltadromeus Late Cretaceous
- Garudimimus Late Cretaceous
- Mapusaurus Late Cretaceous
- Rugops Late Cretaceous
- Spinosaurus Late Cretaceous
Source: Segnosaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.