Hadrosaurus
- When: Late Cretaceous
(80–75 mya) - Where: North America
- What: Hadrosaur
- Weight: 2.5 metric tons
- Length: 7–10 meters
- Diet: Herbivorous
- Discovered: Joseph Leidy in 1858
saur, sauro or saurus
Lizard
(from the Greek word sauros)
Heterodontosaurus
- When: Early Jurassic
(200–190 mya) - Where: Africa
- What: Ornithischian
- Weight: 2 kg
- Length: 1 meter
- Diet: Herbivorous
- Discovered: 1962
Kentrosaurus
- When: Late Jurassic
(155–150 mya) - Where: Africa
- What: Stegosaur
- Weight: 1–2 tons
- Length: 4–5 meters
- Diet: Herbivorous
- Discovered: 1915
Megalosaurus
- When: Middle Jurassic
(166–160 mya) - Where: Europe
- What: Theropod
- Weight: 1–2 tons
- Length: 9–10 meters
- Diet: Carnivorous
- Discovered: 1824
Mosasaurus
- When: Late Cretaceous
(82–66 mya) - Where: Worldwide
- What: Mosasaur squamate
- Weight: 15 metric tons
- Length: 12–17 meters
- Diet: Carnivorous
- Discovered: 1822
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
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
Plateosaurus
- When: Late Triassic
(214–204 mya) - Where: Europe
- What: Sauropodomorph
- Weight: 600–4,000 kg
- Length: 4.8–10 meters
- Diet: Herbivorous
- Discovered: 1837
Pliosaurus
- When: Late Jurassic
(155–145 mya) - Where: Europe
- What: Pliosaur
- Weight: 12–45 metric tons
- Length: 10–13 meters
- Diet: Carnivorous
- Discovered: 1841