ops

Face
(from the Greek word opsis)

Triceratops

When: Late Cretaceous
(68–66 mya)
Where: North America
What: Ceratopsian
Weight: 6–12 tons
Length: 8–9 meters
Diet: Herbivorous
Discovered: 1889

Pentaceratops

When: Late Cretaceous
(75–73 mya)
Where: North America
What: Ceratopsian
Weight: 5 metric tons
Length: 6–8 meters
Diet: Herbivorous
Discovered: 1923

Protoceratops

When: Late Cretaceous
(75–71 mya)
Where: Asia
What: Ceratopsian
Weight: 120–180 kg
Length: 1.8 meters
Diet: Herbivorous
Discovered: 1923

Moschops

When: Permian
(265–260 mya)
Where: Africa
What: Synapsid
Weight: 700–1,000 kg
Length: 2.7–3.5 meters
Diet: Herbivorous
Discovered: 1920

Eotriceratops

When: Late Cretaceous
(68 mya)
Where: North America
What: Ceratopsian
Weight: 10 metric tons
Length: 9 meters
Diet: Herbivorous
Discovered: 2007