Thailand unearths Southeast Asia’s largest dinosaur, the mighty Nagatitan

Discovery and Significance

Scientists have identified a massive new dinosaur species from remains found in Thailand, marking the largest-known dinosaur from Southeast Asia, according to a study published in the journal Scientific Reports. The creature, named Nagatitan chaiyaphumensis, is estimated to have weighed as much as nine adult elephants and stretched 27 meters (88 feet) in length. Weighing about 27 tonnes, it likely roamed what is now Thailand between 100 and 120 million years ago, during the Cretaceous Period.

The name Nagatitan references the Naga, a serpent-like being in some Asian religious traditions, while “chaiyaphumensis” refers to the province of Chaiyaphum where the fossils were found, as reported by Al Jazeera and France 24.

Lead researcher Thitiwoot Sethapanichsakul, a University College London doctoral student in paleontology, described the dinosaur as “big by most people’s standards,” noting it likely weighed at least 10 tonnes more than the famous Diplodocus replica “Dippy,” formerly displayed at London’s Natural History Museum. He also called the species “the last titan” because it was unearthed in one of the youngest rock formations in Thailand where dinosaurs have been found, adding that the region later became a shallow sea, “so this may be the last or most recent large sauropod we will find in Southeast Asia,” as quoted by Al Jazeera and France 24.

Coverage Comparison

Four major outlets — Al Jazeera, France 24, the Jerusalem Post, and the South China Morning Post — covered the discovery, with all confirming the core facts: the new species status, its size, weight, herbivorous diet, and its place as the largest dinosaur in the region. All sources also noted the dinosaur’s physical characteristics, including a long neck, long tail, small head, and four columnar legs.

However, the Jerusalem Post included additional details about the ecosystem, such as the presence of a large predator related to the giant African meat-eating dinosaur Carcharodontosaurus, and described the climate as “probably subtropical, with some forests, as well as savanna-like and shrubland habitats.” These specific ecological insights were not present in the other outlets’ reports, but they are consistent with the broader context of the study.

Reuters, via France 24, provided additional details on the fossil’s discovery: the first remains were spotted by a villager in Chaiyaphum province, and scientists over several years dug up spine, rib, pelvis, and leg bones, including a front leg bone (humerus) measuring 5.8 feet long. The excavation was reportedly completed in 2024. The head and teeth were not found, but researchers inferred its feeding habits from other sauropods.

Key Claims

• Nagatitan chaiyaphumensis is a new species of sauropod dinosaur, confirmed by all four sources.
• It weighed as much as nine adult elephants, approximately 27 tonnes, and was 27 meters long. (All sources)
• It was herbivorous, likely a “bulk browser” consuming large quantities of vegetation like conifers and maybe seed ferns, according to lead researcher Thitiwoot Sethapanichsakul, as reported by Reuters and the Jerusalem Post.
• It lived between 100 and 120 million years ago in what is now Thailand. (All sources)
• It is the largest-known dinosaur from Southeast Asia. (All sources)
• The name references the Naga, a serpent-like being in Asian folklore, and the province of Chaiyaphum. (Reported by Al Jazeera, France 24, and others)
• The ecosystem included other dinosaurs, pterosaurs, crocodiles, and fish, with a subtropical climate and varied habitats, as detailed by the Jerusalem Post.

Perspectives

Scientific Significance

Researchers view this discovery as a major contribution to understanding dinosaur diversity in Southeast Asia. The fact that it is from one of the youngest rock formations in Thailand suggests that large sauropods may have persisted there until the region was submerged by a shallow sea, limiting future finds.

Cultural and Regional Impact

The naming of the dinosaur after the Naga, a mythological serpent in Southeast Asian traditions, highlights the integration of local cultural elements into scientific nomenclature. The discovery also underscores Thailand’s growing role in paleontological research, with a life-size reconstruction on display at Bangkok’s Thainosaur Museum, according to UCL via France 24.

Public Engagement

The comparison to “Dippy” the Diplodocus and the vivid description of its size (nine elephants, 27 meters) help the public grasp the scale of this prehistoric giant, making the story accessible and engaging across media outlets.