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beaked plant-eater · Doubtful name
Tichosteus
Say it like this: “ty-KOS-tee-us”
Tichosteus lucasanus
Tichosteus ate plants 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
- 1877 · Cope, E. D.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- the United States · Morrison
- Food and walking
- Herbivore · Two legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Iguanodontia
The story in short
Tichosteus was formally named in 1877 by E. D. Cope. The name means “walled bone.”
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 herbivore and walked on two legs.
The fossils of Tichosteus 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 Iguanodontia, among the ornithopod dinosaurs.
Close relatives
Emiliasaura
Emiliasaura alessandrii
Early Cretaceous (Valanginian) · roughly 137.1 to 132.6 million years ago
Eucercosaurus
Eucercosaurus tanyspondylus
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Loncosaurus
Loncosaurus argentinus
Late Cretaceous (Cenomanian · Turonian · Coniacian) · roughly 100.5 to 85.7 million years ago