Paleontologists report the identification and formal naming of a new long-necked dinosaur species, Uragasaurus kalasinensis, based on fossils found in Thailand’s Phu Kradung Formation. Multiple outlets describe it as a plant-eating sauropod that lived roughly 150 million years ago, during the Jurassic period. The dinosaur’s neck is described as exceptionally long, with estimates suggesting it made up about half of its total body length. Researchers also report distinctive internal bone features, including “laminae” and air cavities, which they say are unusual compared with other known species. The scientific reporting emphasizes that the find represents the first formally named mamenchisaurid dinosaur from Thailand, and specifically the first occurrence of the Mamenchisauridae family reported from mainland Southeast Asia. One account notes that the species is identified from fossil material that includes a single bone used for the taxonomic determination, as described in a study published in Scientific Reports.