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meaning: "Phu Wiang lizard"
Named By: V. Martin, E. Buffetaut & V. Sweethorn in 1994
Time Period: Early Cretaceous, 140-130 Ma
Location: Thailand - Sao Khua Formation
Size: Roughly about 12.2 meters long
Diet: Herbivore
Fossil(s): Holotype based upon partial but articulated remains. A second individual described in 2009 is preserved at around 60% completeness for the post cranial skeleton (including pelvis, rear leg bones, ribs and partial and complete vertebrae from the entire spinal column), as well as partial skull
Classification: | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Titanosauria | Nemegtosauridae |

Phuwiangosaurus (meaning "Phu Wiang lizard") is a genus of euhelopodid dinosaur from the Early Cretaceous (Valanginian-Hauterivian) Sao Khua Formation of Thailand. The type species, P. sirindhornae, was described by Martin, Buffetaut, and Suteethorn in 1994; it was named to honour Princess Maha Chakri Sirindhorn of Thailand, who was interested in the geology and palaeontology of Thailand.

It was a mid-sized sauropod, measuring 15-20 m in length.

Phuwiangosaurus was originally assigned to Titanosauria, but D'Emic (2012, 2013), Mannion et al. (2013), and Mocho et al. (2014) have reclassified it outside Titanosauria in Euhelopodidae.

Read more about Phuwiangosaurus at Wikipedia
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