PALEONTOLOGY SHOCK: Nagaтιтan chaiyaphumensis – Southeast Asia’s Largest Dinosaur Ever Unearthed!

A colossal new sauropod has shaken the paleontological world. Nagaтιтan chaiyaphumensis, a 27-meter-long, 27-tonne giant nicknamed “the last тιтan of Thailand,” is now confirmed as the largest dinosaur known from Southeast Asia.

The partial skeleton—vertebrae, ribs, pelvis, and a 1.78-meter humerus—was first spotted in 2016 by villager Thanom Luangnan near a pond in Chaiyaphum Province. A decade of careful excavation from the Early Cretaceous Khok Kruat Formation (~100–120 million years old) yielded enough diagnostic bones for formal description in Scientific Reports (May 2026) by Thitiwoot Sethapanichsakul and colleagues.

This euhelopodid тιтanosauriform stood out with unique vertebral features, including two distinct hyposphene-hypantrum morphologies and triangular aliform processes on the neural spines. Phylogenetic analysis places it firmly within Euhelopodidae but not in an endemic Southeast Asian clade with Phuwiangosaurus or Tangvayosaurus. Its sheer size—equivalent to nine Asian elephants—dwarfs all previous Thai finds and rivals many global тιтans.

The name blends “Naga,” the mythical serpent of Thai folklore, with “тιтan,” evoking Greek giants. Researchers call it the region’s “last тιтan” because it comes from Thailand’s youngest dinosaur-bearing rocks. The discovery bolsters the idea that warm, open, relatively dry floodplains fueled a middle-Cretaceous surge in Asian sauropod body size.

As the 14th named dinosaur from Thailand, Nagaтιтan dramatically expands the known diversity of Southeast Asian sauropods and offers fresh clues to how these long-necked behemoths achieved gigantism. The Sahara may have its spinosaurs, but Thailand’s floodplains have just surrendered their own legendary giant.