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sharp-clawed runner · Doubtful name
Koparion
Say it like this: “ko-PAYR-ee-on”
Koparion douglassi
Koparion ate meat and walked on two legs. It lived in the Late Jurassic. Bones have been found in the United States.
- When
- Late Jurassic (Kimmeridgian · Tithonian) · roughly 154.8 to 143.1 million years ago
- Named in
- 1994 · Chure, D. J.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- the United States · Morrison
- Food and walking
- Carnivore · Two legs
- Kind
- sharp-clawed runner · Theropod
- Family branch
- Coelurosauria
The story in short
Koparion was formally named in 1994 by D. J. Chure.
It lived in the Late Jurassic (Kimmeridgian · Tithonian), roughly 154.8 to 143.1 million years ago. Finds come from the United States, including the Morrison Formation. It was a carnivore and walked on two legs.
The fossils of Koparion are too incomplete for a responsible length, hip height, or weight, so those fields are left blank on purpose.
On the family tree it sits in Coelurosauria, among the theropod dinosaurs.
Close relatives
Aniksosaurus
Aniksosaurus darwini
Late Cretaceous (Cenomanian · Turonian) · roughly 100.5 to 89.8 million years ago
Aratasaurus
Aratasaurus museunacionali
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Bicentenaria
Bicentenaria argentina
Late Cretaceous (Cenomanian) · roughly 100.5 to 93.9 million years ago