Patagotitan
- When: Late Cretaceous
(102–95 mya) - Where: South America
- What: Sauropod
- Weight: 55–69 metric tons
- Length: 37 meters
- Diet: Herbivorous
- Discovered: 2017
Pentaceratops
- When: Late Cretaceous
(75–73 mya) - Where: North America
- What: Ceratopsian
- Weight: 5 metric tons
- Length: 6–8 meters
- Diet: Herbivorous
- Discovered: 1923
Perucetus
- When: Eocene
(37–34 mya) - Where: South America
- What: Cetacean Mammal
- Weight: 200 metric tons
- Length: 17–20 meters
- Diet: Carnivorous
- Discovered: 2023
Phorusrhacos
- When: Miocene
(23–15 mya) - Where: South America
- What: Bird
- Weight: 130 kg
- Length: 2.5 meters
- Diet: Carnivorous
- Discovered: 1887
Placodus
- When: Middle Triassic
(247–235 mya) - Where: Europe
- What: Sauropterygian marine reptile
- Weight: 100–200 kg
- Length: 2 meters
- Diet: Durophagous
- Discovered: 1830
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
Plesiosaurus
- When: Early Jurassic
(199–175 mya) - Where: Europe
- What: Plesiosaur
- Weight: 450 kg
- Length: 3.5 meters
- Diet: Piscivorous
- Discovered: 1821
Pliosaurus
- When: Late Jurassic
(155–145 mya) - Where: Europe
- What: Pliosaur
- Weight: 12–45 metric tons
- Length: 10–13 meters
- Diet: Carnivorous
- Discovered: 1841
Polacanthus
- When: Early Cretaceous
(130–125 mya) - Where: Europe
- What: Ankylosaur
- Weight: 1–2 metric tons
- Length: 4–5 meters
- Diet: Herbivorous
- Discovered: 1865