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long-neck giant
Uragasaurus
Uragasaurus kalasinensis
Uragasaurus ate plants and moved in a way the fossils do not settle. It lived in the Late Jurassic · Early Cretaceous. Bones have been found in Thailand.
- When
- Late Jurassic · Early Cretaceous (Tithonian · Berriasian) · roughly 149.2 to 137.1 million years ago
- Named in
- 2026 · Nilpanapan, Apirut; Manitkoon, Sita; Suteethorn, Varavudh; Lauprasert, Komsorn
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- Thailand · Phu Kradung
- Food and walking
- Herbivore · Not recorded
- Kind
- long-neck giant · Sauropod
- Family branch
- Mamenchisauridae
The story in short
Uragasaurus was formally named in 2026 by Apirut Nilpanapan and colleagues. The name means “serpent lizard.”
It lived in the Late Jurassic · Early Cretaceous (Tithonian · Berriasian), roughly 149.2 to 137.1 million years ago. Finds come from Thailand, including the Phu Kradung Formation. It was a herbivore. A habitual gait is not settled.
The fossils of Uragasaurus 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 Mamenchisauridae, among the sauropod dinosaurs.
Close relatives
Analong
Analong chuanjieensis
Middle Jurassic (Bajocian) · roughly 170.9 to 168.2 million years ago
Anhuilong
Anhuilong diboensis
Middle Jurassic (Aalenian–Callovian) · roughly 174.7 to 161.5 million years ago
Chuanjiesaurus
Chuanjiesaurus anaensis
Middle Jurassic (Bajocian) · roughly 170.9 to 168.2 million years ago