A giant, long-necked dinosaur that once roamed what is now Thailand has been identified as a brand-new species, rewriting what scientists know about prehistoric life in Southeast Asia.
Named Nagatitan chaiyaphumensis, this enormous plant-eater is the largest dinosaur ever discovered in the region. Researchers estimate it weighed around 27 metric tonnes, roughly the same as nine adult Asian elephants, and stretched an incredible 27 metres (about 89 feet) from head to tail. To put that into perspective, the dinosaur was more than twice the size of a typical Tyrannosaurus rex.
The study describing the new species was published in Scientific Reports and led by researchers from University College London and several Thai institutions.
Nagatitan Chaiyaphumensis Found In Thailand
The story began in 2016, when a local resident spotted unusual bones exposed near a communal pond in Thailand’s Chaiyaphum Province during the dry season, when water levels had dropped. What looked like a few scattered fossils turned out to be part of a truly colossal dinosaur.
Over several years, scientists carried out excavations and recovered fossils from the animal’s leg bones, ribs, vertebrae, and pelvis. One of the most impressive finds was the humerus, or upper front leg bone, which measured 1.78 meters, nearly six feet long.
Lead author Thitiwoot Sethapanichsakul, a Thai PhD student at UCL, said seeing the massive bone for the first time was unforgettable.
“When I first laid eyes on the humerus, it was taller than me,” he told a news media company, describing the moment as both surprising and exciting.
Using 3D scans and detailed comparisons with other dinosaur fossils, researchers concluded that the bones belonged to a species previously unidentified.
For Sethapanichsakul, the discovery was especially meaningful. A lifelong dinosaur enthusiast, he said, naming a new dinosaur fulfilled a promise he made to himself as a child.
Why It’s Called Nagatitan
The dinosaur’s name carries both scientific and cultural significance.
“Naga” refers to the mythical serpent beings that appear in South and Southeast Asian folklore, while “titan” refers to the powerful deities of Greek mythology. The species name, “chaiyaphumensis,” honours Chaiyaphum Province, where the fossils were discovered. Together, the name means “the giant serpent titan from Chaiyaphum.”
The researchers have also nicknamed it Thailand’s “last titan.” That title reflects the age of the rocks where the fossils were found. These rocks are the youngest known dinosaur-bearing formations in Thailand, dating to between 100 and 120 million years ago during the Early Cretaceous period.
According to Sethapanichsakul, younger rock layers in the region were formed after the area became a shallow sea, making future dinosaur discoveries less likely. In other words, Nagatitan may have been one of the last giant dinosaurs to have lived in what is now Southeast Asia.
A Window Into An Ancient Hot World
Beyond its extraordinary size, Nagatitan is helping scientists understand how dinosaurs thrived during a period of rising global temperatures.
Around 100 million years ago, Earth had much higher levels of atmospheric carbon dioxide than today, and the climate was significantly warmer. That raises an intriguing question: how did animals this enormous avoid overheating?
According to Co-author Paul Upchurch, the answer may lie in the plants these giants ate. Warmer conditions likely changed the abundance and nutritional quality of vegetation, allowing herbivorous dinosaurs to grow to immense sizes.
Sauropods like Nagatitan were already the largest land animals in Earth’s history, but this discovery suggests they were able to flourish even in hotter environments than scientists once expected.
The find also highlights Thailand’s growing importance in dinosaur research. Nagatitan is the 14th dinosaur species officially named from the country. According to Thai palaeontologist Sita Manitkoon, Thailand may have one of the richest dinosaur fossil records in Asia.
For scientists and dinosaur lovers alike, Nagatitan chaiyaphumensis is a spectacular reminder that remarkable prehistoric discoveries are still waiting to be uncovered, sometimes at the edge of an ordinary village pond.
(With inputs from various sources)
FAQs
1. What is Nagatitan chaiyaphumensis?
Nagatitan chaiyaphumensis is a newly discovered species of giant sauropod dinosaur identified from fossils found in Chaiyaphum Province, Thailand.
2. How big was the dinosaur found in Thailand?
Scientists estimate it weighed about 27 metric tonnes and measured roughly 27 metres (89 feet) long.
3. Why is this discovery important?
It is the largest dinosaur ever discovered in Southeast Asia and provides valuable insights into prehistoric ecosystems and dinosaur evolution in Asia.
4. What does the name Nagatitan mean?
The name combines “Naga,” the mythical serpent of South and Southeast Asian folklore, with “Titan,” referring to powerful deities in Greek mythology.
5. When did Nagatitan live?
The dinosaur lived between 100 and 120 million years ago during the Early Cretaceous period.
