Look up · dinosaur 1247 of 1,425
beaked plant-eater
Thespesius
Say it like this: “thes-PEE-zhus”
Thespesius occidentalis
Thespesius ate plants and walked on two or four legs. It lived in the Late Cretaceous. Bones have been found in the United States.
- When
- Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago
- Named in
- 1856 · Leidy, J.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- the United States · Lance
- Food and walking
- Herbivore · Two or four legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Hadrosauridae
The story in short
The genus Thespesius dates to 1856, the year J. Leidy described it. The name means “wondrous one.”
It lived in the Late Cretaceous (Maastrichtian), roughly 72.2 to 66 million years ago. Finds come from the United States, including the Lance Formation. It was a herbivore and could move on two or four legs.
The fossils of Thespesius 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 Hadrosauridae, among the ornithopod dinosaurs.
Close relatives
Aquilarhinus
Aquilarhinus palimentus
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Arstanosaurus
Arstanosaurus akkurganensis
Late Cretaceous (Santonian · Campanian) · roughly 85.7 to 72.2 million years ago
Barsboldia
Barsboldia sicinskii
Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago