Nothosaurus
- When: Middle Triassic
(240–210 mya) - Where: Europe, Asia
- What: Nothosaur
- Weight: 100–150 kg
- Length: 3–4 meters
- Diet: Carnivorous
- Discovered: 1834
Nyasasaurus
- When: Middle Triassic
(243 mya) - Where: Africa
- What: Dinosaur
- Weight: 20–60 kg
- Length: 2–3 meters
- Diet: Possibly omnivorous or herbivorous
- Discovered: 1956
Ornithomimus
- When: Late Cretaceous
(76–66 mya) - Where: North America
- What: Theropod
- Weight: 150 kg
- Length: 3.5 meters
- Diet: Omnivorous
- Discovered: 1890
Ouranosaurus
- When: Early Cretaceous
(125–112 mya) - Where: Africa
- What: Ornithopod
- Weight: 4 metric tons
- Length: 7–8 meters
- Diet: Herbivorous
- Discovered: 1976
Oviraptor
- When: Late Cretaceous
(85–70 mya) - Where: Asia
- What: Theropod
- Weight: 20–30 kg
- Length: 1.5–2 meters
- Diet: Likely omnivorous
- Discovered: 1924
Pachycephalosaurus
- When: Late Cretaceous
(70–65 mya) - Where: North America
- What: Pachycephalosaur
- Weight: 450–1,000 kg
- Length: 4.5–5.5 meters
- Diet: Herbivorous
- Discovered: 1931
Pachyrhinosaurus
- When: Late Cretaceous
(73–69 mya) - Where: North America
- What: Ceratopsian
- Weight: 3–4 metric tons
- Length: 6 meters
- Diet: Herbivorous
- Discovered: 1950
Parasaurolophus
- When: Late Cretaceous
(76.5–73 mya) - Where: North America
- What: Hadrosaur
- Weight: 2.5–3.5 tons
- Length: 9–10 meters
- Diet: Herbivorous
- Discovered: 1922