Elasmosaurus
- When: Late Cretaceous
(80–65 mya) - Where: North America
- What: Plesiosaur
- Weight: 2–3 metric tons
- Length: 10–14 meters
- Diet: Piscivorous
- Discovered: 1868
Eodromaeus
- When: Late Triassic
(231 mya) - Where: South America
- What: Theropod
- Weight: 5 kg
- Length: 1.2 meters
- Diet: Carnivorous
- Discovered: 2011
Eoraptor
- When: Late Triassic
(231–228 mya) - Where: South America
- What: Theropod
- Weight: 10 kg
- Length: 1 meter
- Diet: Omnivorous
- Discovered: 1993
Eotriceratops
- When: Late Cretaceous
(68 mya) - Where: North America
- What: Ceratopsian
- Weight: 10 metric tons
- Length: 9 meters
- Diet: Herbivorous
- Discovered: 2007
Erythrosuchus
- When: Middle Triassic
(247–242 mya) - Where: Africa
- What: Archosaur
- Weight: 500 kg
- Length: 5 meters
- Diet: Carnivorous
- Discovered: 1905
Eudimorphodon
- When: Late Triassic
(210 mya) - Where: Europe
- What: Pterosaur
- Weight: 1 kg
- Length: Wingspan 1 meter
- Diet: Carnivorous
- Discovered: 1970
Euoplocephalus
- When: Late Cretaceous
(76–67 mya) - Where: North America
- What: Ankylosaur
- Weight: 2–2.5 metric tons
- Length: 6 meters
- Diet: Herbivorous
- Discovered: 1910
Eustreptospondylus
- When: Middle Jurassic
(165 mya) - Where: Europe
- What: Theropod
- Weight: 200 kg
- Length: 4.5 meters
- Diet: Carnivorous
- Discovered: Richard Owen in 1841
Futalognkosaurus
- When: Late Cretaceous
(87–80 mya) - Where: South America
- What: Sauropod
- Weight: 38–50 metric tons
- Length: 26 meters
- Diet: Herbivorous
- Discovered: 2007