- Length
- 5.3 m
- Diet
- Ate plants and animals
- When
- Late Cretaceous94 to 89 million years ago
- Fossils found in
- USA
- Named by
- Kirkland and Wolfe (2001)
- 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
- Zuniceratops · same country
- Brachylophosaurus · same country
- Eolambia · same country
- Oryctodromeus · same country
- Protohadros · same country
- Sauropelta · same country
- Achillobator
- Aralosaurus
Other large theropods
- Rugops Late Cretaceous
- Gigantoraptor Late Cretaceous
- Segnosaurus Late Cretaceous
- Alectrosaurus Late Cretaceous
- Achillobator Late Cretaceous
- Carcharodontosaurus Late Cretaceous
- Deltadromeus Late Cretaceous
- Garudimimus Late Cretaceous
Source: Nothronychus 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.