Outline: a typical sauropod

Phu Kradung Fm., ThailandNamed 2026

Uragasaurus

"serpent lizard"

Type species Uragasaurus kalasinensis

Lived
149 to 137 million years ago, Late Jurassic to Early Cretaceous
Diet
Herbivore
Group
Sauropods, Mamenchisauridae
Found in
Thailand
Named by
Nilpanapan et al. 2026

Where its fossils were found

The evidence

Today

1 find

145 million years ago

Map: C. R. Scotese, PALEOMAP

Field notes

About Uragasaurus

What it was like

Uragasaurus was a mamenchisaurid, a long-necked plant eater from the family of Mamenchisaurus. It is known from a single back bone.

Its world

It lived in the Late Jurassic or Early Cretaceous in what is now Thailand. Its bone comes from the Phu Kradung Formation, where the small plant eater Minimocursor also lived.

How it was found

Nilpanapan and colleagues named it in 2026. The type species is Uragasaurus kalasinensis. It is the first mamenchisaurid named from Thailand.

Lived alongside

Found in the same rock formations

Close relatives

Other members of Mamenchisauridae

Sources: WikidataNamed in: A. Nilpanapan, S. Manitkoon, and V. Suteethorn, K. Lauprasert. 2026. A new mamenchisaurid sauropod from the Lower Phu Kradung Formation, Upper Jurassic of northeastern Thailand. Scientific Reports 16(1):21205:1-16