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long-neck giant · Doubtful name
Ultrasaurus
Say it like this: “UL-truh-SAWR-us”
Ultrasaurus tabriensis
Ultrasaurus ate plants and walked on four legs. It lived in the Early Cretaceous. Bones have been found in South Korea.
- When
- Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
- Named in
- 1983 · Kim, H. M.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- South Korea · Hupyeongdong
- Food and walking
- Herbivore · Four legs
- Kind
- long-neck giant · Sauropod
- Family branch
- Sauropoda
The story in short
The genus Ultrasaurus dates to 1983, the year H. M. Kim described it. The name means “ultra lizard.”
It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from South Korea, including the Hupyeongdong Formation. It was a herbivore and walked on four legs.
The fossils of Ultrasaurus 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 Sauropoda, among the sauropod dinosaurs.
Close relatives
Aepisaurus
Aepisaurus elephantinus
Early Cretaceous (Albian) · roughly 113.2 to 100.5 million years ago
Amygdalodon
Amygdalodon patagonicus
Early Jurassic (Pliensbachian · Toarcian) · roughly 192.9 to 174.7 million years ago
Archaeodontosaurus
Archaeodontosaurus descouensi
Middle Jurassic (Bathonian) · roughly 168.2 to 165.3 million years ago