- Length
- 5 m
- Diet
- Meat-eater
- When
- Late Cretaceous99 to 84 million years ago
- Fossils found in
- Mongolia
- Named by
- Perle, Norell and Clark (1999)
- Family tree
- Dinosauria › Saurischia › Theropoda › Dromaeosauridae
Large theropods. Big two-legged meat-eaters, such as Tyrannosaurus. See all 63
Lived at the same time
- Graciliceratops · same country
- Tsagantegia · same country
- Erlikosaurus · same country
- Garudimimus · same country
- Talarurus · same country
- Segnosaurus · same country
- Alectrosaurus · same country
- Microceratus · same country
Other large theropods
- Carcharodontosaurus Late Cretaceous
- Deltadromeus Late Cretaceous
- Garudimimus Late Cretaceous
- Mapusaurus Late Cretaceous
- Spinosaurus Late Cretaceous
- Giganotosaurus Late Cretaceous
- Segnosaurus Late Cretaceous
- Tyrannotitan Early Cretaceous
Source: Achillobator 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.