Pliosaurus
- When: Late Jurassic
(155–145 mya) - Where: Europe
- What: Pliosaur
- Weight: 12–45 metric tons
- Length: 10–13 meters
- Diet: Carnivorous
- Discovered: 1841
Pliosaur
Liopleurodon
- When: Middle to Late Jurassic
(166–155 mya) - Where: Europe
- What: Pliosaur
- Weight: 25–35 metric tons
- Length: 10 meters
- Diet: Carnivorous
- Discovered: 1873