Archaeopteryx
- When: Late Jurassic
(150 mya) - Where: Europe
- What: Avialan theropod
- Weight: 0.5–1 kg
- Length: 0.5 meters
- Diet: Carnivorous
- Discovered: 1861
eo
Early or Dawn
(from the Greek goddess of the dawn, Eos)
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