- Length
- 1.8 m
- Weight
- 400 kg
- Diet
- Plant-eaterplant material
- Walked
- On 4 legs
- When
- Late Cretaceous74 to 70 million years ago
- Fossils found in
- China, Mongolia
- Named by
- Granger and Gregory (1923)
- Family tree
- Dinosauria › Ornithischia › Ceratopsia › Neoceratopsia › Coronosauria
Ceratopsians. Horned and frilled plant-eaters, such as Triceratops. See all 29
Lived at the same time
- Alectrosaurus · same country
- Anserimimus · same country
- Archaeornithomimus · same country
- Borogovia · same country
- Gilmoreosaurus · same country
- Microceratus · same country
- Mononykus · same country
- Prenocephale · same country
Other ceratopsians
- Anchiceratops Late Cretaceous
- Einiosaurus Late Cretaceous
- Pachyrhinosaurus Late Cretaceous
- Arrhinoceratops Late Cretaceous
- Centrosaurus Late Cretaceous
- Chasmosaurus Late Cretaceous
- Pentaceratops Late Cretaceous
- Styracosaurus Late Cretaceous
Source: Protoceratops 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.