A monumental discovery in Thailand has unveiled the Nagatitan chaiyaphumensis, an colossal long-necked herbivore now recognized as the largest dinosaur ever found in Southeast Asia. Weighing an estimated 27 tonnes – comparable to nine adult Asian elephants – and stretching an impressive 27 meters (88 feet) in length, this sauropod surpasses even the renowned Diplodocus in size. Its identification sheds new light on the prehistoric fauna that roamed the region millions of years ago.

The identification of this ancient giant stems from fossils unearthed a decade ago beside a pond in Thailand’s northeastern Chaiyaphum province. A collaborative team of researchers from the UK and Thailand meticulously studied these remains, culminating in the formal naming of the species. The name “Nagatitan” draws inspiration from Southeast Asian folklore’s serpent “naga” and Greek mythology’s “titan” gods, while “chaiyaphumensis” denotes its provincial origin. The Nagatitan lived approximately 100 to 120 million years ago, a period predating the Tyrannosaurus Rex by roughly 40 million years, and was roughly twice the size of the famous predator.

The study, led by Thai doctoral student Thitiwoot Sethapanichsakul from University College London (UCL) and published in the Scientific Reports journal, suggests that the Nagatitan’s existence offers crucial insights into how ancient climatic shifts facilitated the evolution of such gigantic dinosaurs. Researchers have dubbed it “the last titan” of Thailand, a moniker stemming from its fossils being located within the country’s youngest dinosaur-bearing rock formation. Co-author Professor Paul Upchurch of UCL noted the intriguing challenge for large sauropods like Nagatitan to thrive in a period characterized by rising atmospheric carbon dioxide levels and high global temperatures, as massive bodies typically struggle to dissipate heat. These warmer conditions likely influenced the plant life essential for these enormous herbivores.

Thailand continues to emerge as a significant hub for paleontological discoveries, with the Nagatitan marking the 14th dinosaur species identified within its borders. Dr. Sita Manitkoon, a palaeontologist from Mahasarakham University, highlights the nation’s rich diversity in dinosaur fossils, positioning it as potentially the third most abundant country in Asia for such remains. This ongoing stream of findings underscores Thailand’s importance in understanding the broader narrative of dinosaur life and evolution across the continent.