This exceptional fossil features a caudal vertebra with attached ribs from Psittacosaurus, an early ceratopsid dinosaur that roamed the Earth during the Lower Cretaceous period over 100 million years ago. The caudal vertebra, a key part of the dinosaur’s tail, is beautifully preserved, complete with the ribs and neural spine extending from the vertebral column, showcasing the remarkable preservation of this ancient structure. Notably, this specimen is completely natural, with no restored parts—every feature is preserved in its original form, offering an untouched and authentic glimpse into the distant past. Psittacosaurus, famous for its parrot-like beak and agile bipedal stance, was one of the first ceratopsians to evolve. This specimen provides an extraordinary opportunity to study the tail anatomy of a species that helped pave the way for later, more famous ceratopsians like Triceratops. The attached ribs add a rare layer of anatomical detail, allowing for a deeper understanding of the creature’s muscular structure and tail functionality. Complete or partially preserved caudal vertebrae with ribs from Psittacosaurus are highly sought after but incredibly rare, making this fossil an invaluable piece for any collector, paleontologist, or museum. The preservation of all the five vertebra and ribs in such a well-preserved state, with no restoration . This specimen represents more than just a piece of natural history; it is a connection to the distant past, a tangible reminder of the ancient ecosystems where these remarkable creatures once lived. With its striking preservation, scientific significance, and completely natural condition, this fossil will undoubtedly be the centerpiece of any collection, making it a truly rare and valuable find. Psittacosaurus mazongshensis Yu 1997, from the Lower Xinminbao Formation of Ganzu Province, China. Bones are 9 x 3,5 x 3,5 cm . Nice display included.