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Paleontologists in South Korea have identified a novel species of dinosaur, designating it Doolysaurus huhmini. The nomenclature pays homage to Dooly, a celebrated juvenile dinosaur character from Korean animation, and to paleontologist Min Huh. The fossil, representing a juvenile individual approximately two years old at death, was extracted from a Cretaceous-period rock formation. Utilizing advanced micro-computed tomography (micro-CT) imaging, researchers non-destructively visualized the skeletal elements encased within a dense sandstone matrix. The discovery included over forty gastroliths, or stomach stones, indicating an omnivorous diet.
Researchers from the University of Texas at Austin formally announced the discovery on March 19, 2026. The dinosaur, an omnivorous thescelosaurid, was bipedal and comparable in size to a modern turkey, with an estimated mass of 8.3 kilograms. Analysis suggests the potential presence of integumentary structures, specifically filamentous protofeathers, which may have conferred a fuzzy or downy appearance. The complete binomial, Doolysaurus huhmini, integrates cultural and scientific recognition; the genus references the animated character Dooly, while the specific epithet honors Min Huh, founder of the Korean Dinosaur Research Center.
Jongyun Jung, the study's lead author from the University of Texas at Austin, elucidated the rationale for the name: "Dooly is an iconic, generational character within Korean popular culture. Given that our specimen is also a juvenile, it presented a fitting opportunity to commemorate this cultural figure through taxonomic nomenclature."
Co-author Julia Clarke, also from UT Austin, offered a comparative anatomical perspective: "Its postulated integumentary covering might have rendered it visually analogous to a juvenile lamb, an appearance that would likely be perceived as endearing."
The peer-reviewed journal Fossil Record published the formal description on March 19, 2026.
While dinosaur ichnofossils, such as tracks and eggs, have precedent in the Korean peninsula, skeletal fossils are exceptionally rare. Doolysaurus huhmini constitutes the first dinosaur taxon described from osseous remains discovered in South Korea in fifteen years. Field researcher Hyemin Jo located the specimen in 2023 on Aphae Island, situated off the nation's southwestern coast.
The fossil comprised a partial skeleton permineralized within an extremely indurated sandstone concretion. Extricating the fragile bones via traditional mechanical preparation would have required several years of meticulous labor. To circumvent this temporal constraint, the research consortium employed micro-CT technology at the University of Texas at Austin. This methodology utilizes X-rays to generate a series of cross-sectional images, which are computationally reconstructed into a high-fidelity three-dimensional model of the internal matrix.
The tomographic data revealed a more extensive and complete skeletal assemblage than surface examination indicated, including previously obscured cranial elements. Jongyun Jung noted the significance of this finding: "Initial assessment identified limb bones and vertebral fragments. The subsequent revelation of cranial components and additional postcranial material via tomography generated considerable excitement, as it represents the first Korean dinosaur discovery with preserved skull and dental elements."
The stratigraphic layer containing the Doolysaurus holotype dates to the mid-Cretaceous period, approximately 113 to 94 million years before present. Ontogenetic assessment, conducted via histological analysis of a femoral cross-section, confirmed the individual was a juvenile, roughly two years old at death. Projections suggest an adult Doolysaurus could have attained twice the mass of the discovered specimen, reaching a weight of approximately 16.6 kilograms.
Phylogenetic analysis classifies Doolysaurus within the Thescelosauridae family, a clade of small, bipedal, herbivorous-to-omnivorous ornithischians known from Cretaceous deposits in both East Asia and North America. The potential for filamentous integument aligns with morphological hypotheses for other members of this group.
A notable ancillary discovery was a cluster of over forty siliceous gastroliths, ranging from 2 to 10 millimeters in diameter, commingled with the skeletal remains. These gizzard stones are ingested by certain herbivorous and omnivorous vertebrates to facilitate the mechanical breakdown of plant matter within the muscular ventriculus of the digestive tract. Their presence in extant taxa, such as crocodilians and some avian species, provides a modern analog.
The morphology and quantity of these gastroliths provide strong evidence for an omnivorous dietary regime in Doolysaurus, likely encompassing plant material, insects, and other small fauna. Intriguingly, the initial impetus for tomographic scanning stemmed from the visible presence of a few such stones on the exterior of the rock matrix. Julia Clarke explained the investigative chain: "The co-occurrence of gastroliths with articulated limb bones suggested the carcass was not extensively scavenged prior to burial. This taphonomic context prompted the decision to employ high-resolution X-ray computed tomography at the UTCT facility to non-invasively probe the concretion's interior."
The discovery of Doolysaurus, largely in situ within its lithic matrix, implies potential for further vertebrate fossil discoveries in similar Korean formations. Jongyun Jung advocates for the continued application of micro-CT technology as a pivotal tool for future paleontological exploration in the region.
In synthesis, the identification of Doolysaurus huhmini represents a significant paleontological advancement for South Korea, merging advanced imaging technology with traditional taxonomic practice. The dinosaur's nomenclature bridges cultural heritage and scientific achievement, while its morphological and ecological analysis provides new insights into the diversity of mid-Cretaceous Asian thescelosaurids.