Genus
Valid Extinct

Uragasaurus

Nilpanapan et al. 2026

Uragasaurus is an extinct genus of mamenchisaurid sauropod dinosaur known from the Late Jurassic Phu Kradung Formation of Thailand. The genus contains a single species, Uragasaurus kalasinensis, known from a single dorsal (trunk) vertebra. It is the first member of the family Mamenchisauridae named from Thailand.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Uragasaurus
click to enlarge
The holotype anterior dorsal vertebra of Uragasaurus kalasinensis (PRC 460) in anterior (a) and posterior (b) views. Digital rendering of the specimen in anterior (c), posterior (d), right lateral (e), left lateral (f), dorsal (g), and ventral (h) views. Asterisk refers to an autapomorphic character. The blue highlight indicates the pneumatic fossa and pleurocoel. © A. Nilpanapan S. Manitkoon, V. Suteethorn & K. Lauprasert · CC BY 4.0 · Wikimedia
Uragasaurus
Uragasaurus
Uragasaurus
Uragasaurus
Uragasaurus
Uragasaurus
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Sauropodiformes Unranked clade
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Sauropoda Unranked clade
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Gravisauria Unranked clade
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Eusauropoda Unranked clade
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Mamenchisauridae Unranked clade
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Uragasaurus Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇹🇭 Thailand
1
Geological formations
Phu Kradung
1
Temporal distribution
Tithonian (149.2–143.1 Ma)
1
Species (1)
Uragasaurus kalasinensis 149 Ma
News 2
Uragasaurus – A New Mamenchisaurid Sauropod from Thailand
bone limb vertebra Thailand fossil +4
A team of international researchers has named a remarkable new species of long-necked dinosaur from Thailand. Uragasaurus kalasinensis is the first formally described member of the Mamenchisauridae from Thailand. Although the fossil evidence consists of a single vertebra, the bone preserves a unique combination of anatomical features that enabled scientists to identify an entirely new
15/07/2026 everythingdinosaur
New Species of Long-Necked Dinosaur Identified in Thailand
New Species of Long-Necked Dinosaur Identified in Thailand
Thailand Dinosauria Mamenchisauridae Uragasaurus new species
Paleontologists working in northeastern Thailand have identified a new species of mamenchisaurid sauropod dinosaur, offering fresh evidence that a group of giant sauropods once thought to be almost exclusively East Asian also roamed mainland Southeast Asia. The post New Species of Long-Necked Dinosaur Identified in Thailand appeared first on Sci.News: Breaking Science News.
09/07/2026 sci-news
Images 6
Bibliography
Original description
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 DOI ↗
Bibliography (1)
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 DOI ↗