Corythosaurus
- When: Late Cretaceous
(77–75 mya) - Where: North America
- What: Hadrosaur
- Weight: 3–5 metric tons
- Length: 9–10 meters
- Diet: Herbivorous
- Discovered: 1914
Deinonychus
- When: Early Cretaceous
(115–108 mya) - Where: North America
- What: Dromaeosaurid theropod
- Weight: 70–100 kg
- Length: 3.4 meters
- Diet: Carnivorous
- Discovered: 1969
Deinosuchus
- When: Late Cretaceous
(82–73 mya) - Where: North America
- What: Crocodyliform
- Weight: 8–10 metric tons
- Length: 10–12 meters
- Diet: Carnivorous
- Discovered: 1954
Dimetrodon
- When: Permian
(295–272 mya) - Where: North America
- What: Synapsid
- Weight: 250–300 kg
- Length: 3–4.6 meters
- Diet: Carnivorous
- Discovered: 1878
Dimorphodon
- When: Early Jurassic
(200–190 mya) - Where: Europe
- What: Pterosaur
- Weight: 1–2 kg
- Length: 1.4 meters
- Diet: Insectivorous and piscivorous
- Discovered: 1859
Diplodocus
- When: Late Jurassic
(154–152 mya) - Where: North America
- What: Sauropod
- Weight: 10–16 tons
- Length: 24–27 meters
- Diet: Herbivorous
- Discovered: 1878
Dreadnoughtus
- When: Late Cretaceous
(75–70 mya) - Where: South America
- What: Sauropod
- Weight: 49 metric tons
- Length: 26 meters
- Diet: Herbivorous
- Discovered: 2014
Edmontonia
- When: Late Cretaceous
(76–70 mya) - Where: North America
- What: Nodosaurid ankylosaur
- Weight: 3–4 metric tons
- Length: 6–7 meters
- Diet: Herbivorous
- Discovered: 1928
Edmontosaurus
- When: Late Cretaceous
(73–66 mya) - Where: North America
- What: Hadrosaur
- Weight: 4 metric tons
- Length: 12 meters
- Diet: Herbivorous
- Discovered: 1917