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beaked plant-eater
Koshisaurus
Say it like this: “koh-shee-SOR-us”
Koshisaurus katsuyama
Koshisaurus ate plants and walked on two or four legs. It lived in the Early Cretaceous. Bones have been found in Japan.
- When
- Early Cretaceous (Aptian) · roughly 121.4 to 113.2 million years ago
- Named in
- 2015 · Shibata, M.; Azuma, Y.
- Hip height
- Not established
- Length
- 3.9 m · 13 ft
- Weight
- Not established
- Found in
- Japan · Kitadani
- Food and walking
- Herbivore · Two or four legs
- Kind
- beaked plant-eater · Ornithopod
- Family branch
- Hadrosauroidea
The story in short
The genus Koshisaurus dates to 2015, the year M. Shibata and Y. Azuma described it. The name honors a person tied to the fossil or its study.
It lived in the Early Cretaceous (Aptian), roughly 121.4 to 113.2 million years ago. Finds come from Japan, including the Kitadani Formation. It was a herbivore and could move on two or four legs.
Published estimates put Koshisaurus at a length near 3.9 m.
On the family tree it sits in Hadrosauroidea, among the ornithopod dinosaurs.
Close relatives
Altirhinus
Altirhinus kurzanovi
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Batyrosaurus
Batyrosaurus rozhdestvenskyi
Late Cretaceous (Santonian · Campanian) · roughly 85.7 to 72.2 million years ago
Bolong
Bolong yixianensis
Early Cretaceous (Barremian) · roughly 125.8 to 121.4 million years ago