Researchers recovering copper mineral samples in Inner Mongolia have discovered the first dinosaur fossil from the western section of the Bayan Gobi Formation, according to a study published September 5, 2026, in the journal Earth History and Biodiversity. Cataloged as specimen 208GPV01, the fossil was pulled from a drill core at a depth of 473 meters near Guaizihu in the Yin’gen-Ejinaqi Basin, extending the known geographic range of Early Cretaceous dinosaur fossils in the region.
Drill Core Discovery Expands Yin’gen-Ejinaqi Basin Fossil Range
The unexpected discovery occurred during routine mineral exploration by a team of Chinese geologists working in the remote western portion of the Bayan Gobi Formation. According to Dr. Lida Xing of the China University of Geosciences and the Dinosaur Odyssey Science Museum, the continental deposit dates back roughly 115 million years to the Early Cretaceous epoch. Prior to this find, nearly all notable dinosaur fossils recovered from the formation—including the hadrosauroid Penelopognathus weishampeli, the ceratopsian Psittacosaurus sibiricus, and the alvarezsauroid Bannykus wulatensis—came from the eastern part of the Yin’gen-Ejinaqi Basin. The recovery of 208GPV01 from deep underground core samples proves that dinosaur remains span a wider territory within the northern China basin.
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Anatomy and Classification of Specimen 208GPV01
The fossil material consists primarily of proximal tail vertebrae and several associated skeletal elements. According to the research team, 208GPV01 comprises a sacral rib, four caudal vertebral centra, six caudal neural arches, several transverse processes, and ossified tendons. To determine the animal’s classification, scientists compared its proportions with numerous other ornithischian species using geometric morphometrics. The analysis revealed that the specimen belongs to Ornithischia—a group of plant-eating, bird-hipped dinosaurs—and its vertebral proportions closely resemble those of Psittacosaurus, a common early horned dinosaur across Cretaceous East Asia. Because the recovered material is limited, the authors stopped short of assigning the specimen to a specific genus or species, classifying it for now as an indeterminate ornithischian.
Evolutionary Context and the Jehol Biota Connection
The Bayan Gobi Formation shares notable similarities with the nearly contemporaneous fossil assemblages of Western Liaoning. According to Dr. Xing and colleagues, these shared traits suggest that the Yin’gen-Ejinaqi Basin may belong to the broader radiation range of the Jehol Biota, despite distinct local differences in fauna.
Frequently Asked Questions
What kind of dinosaur does specimen 208GPV01 represent?
The fossil belongs to Ornithischia, a group of plant-eating, bird-hipped dinosaurs. Its vertebral proportions closely resemble those of Psittacosaurus, though it remains classified as an indeterminate ornithischian due to limited material.
Where was the fossil found?
According to the study published in Earth History and Biodiversity, the specimen was pulled from a drill core at a depth of 473 meters during a copper mineral survey near Guaizihu in the western Yin’gen-Ejinaqi Basin of Inner Mongolia, China.
How old is the Bayan Gobi Formation fossil?
The fossil dates back approximately 115 million years to the Early Cretaceous epoch.
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