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Paleontologists in South Korea have identified a novel dinosaur species, designating it Doolysaurus huhmini. The nomenclature pays homage to Dooly, a quintessential Korean animated dinosaur character, and honors the contributions of a distinguished national paleontologist. The fossil specimen, representing a juvenile individual, was subjected to non-invasive micro-computed tomography, revealing an unexpectedly complete skeletal assembly, including cranial elements, and a collection of gastroliths indicative of omnivorous dietary habits.
Researchers from the University of Texas at Austin formally announced the discovery on March 19, 2026. The dinosaur was an omnivore, consuming both plant matter and animal prey. It was a bipedal theropod, approximately analogous in size to a modern turkey, with an estimated live mass of 8.3 kilograms. The scientific team hypothesizes that its integument may have been adorned with filamentous, proto-feather-like structures, conferring a potentially fuzzy external appearance. The complete binomial, Doolysaurus huhmini, integrates a cultural reference with scientific recognition; the generic name derives from the cartoon character Dooly, a mischievous green juvenile dinosaur prevalent in South Korean popular media since the late 1980s.
Jongyun Jung, the principal investigator from the University of Texas at Austin, elucidated the rationale for the taxonomic designation:
Dooly is one of the very famous, iconic dinosaur characters in Korea. Every generation in Korea knows this character. And our specimen is also a juvenile or ‘baby,’ so it’s perfect for our dinosaur species name to honor Dooly.
Julia Clarke, a co-author and professor at the same institution, provided a comparative anatomical description:
I think it would have been pretty cute. It might have looked a bit like a little lamb.
The formal description was published in the scholarly periodical Fossil Record on the aforementioned date.
While ichnofossils, such as tracks and eggs, have been previously documented on the Korean Peninsula, the recovery of osteological material is exceptionally uncommon. Indeed, Doolysaurus constitutes the first dinosaur taxon described from skeletal fossils discovered in South Korea in a decade and a half. The holotype was located in 2023 by researcher Hyemin Jo on Aphae Island, situated off the nation's southwestern coast.
The fossil comprised a partial skeleton entombed within an indurated sandstone concretion. Extricating the fragile bones via traditional mechanical preparation techniques would have necessitated several years of meticulous labor. To circumvent this protracted timeline and mitigate risk of damage, the consortium employed micro-computed tomography (micro-CT) at the University of Texas at Austin. This technology utilizes X-rays to generate sequential cross-sectional images, which are computationally reconstructed into a high-resolution three-dimensional digital model of the internal matrix.
The tomographic data revealed a more extensive and articulated skeletal system than surface examination suggested, incorporating previously obscured cranial and dental components. Jongyun Jung remarked on the significance of this revelation:
When we first found the specimen, we saw some leg bones preserved and some vertebrae. We didn't expect skull parts and so many more bones. There was a fair amount of excitement when we saw what was hidden inside the block.
This discovery is particularly consequential as it represents the first dinosaur specimen from South Korea with preserved cranial elements and dentition, offering critical insights into its feeding ecology and phylogenetic relationships.
The genus name Doolysaurus acknowledges the cultural icon Dooly. The specific epithet, huhmini, recognizes Min Huh, a preeminent Korean paleontologist who established the Korean Dinosaur Research Center and has dedicated over three decades to the study of the region's Mesozoic fauna.
The lithological unit encasing the specimen dates to the mid-Cretaceous period, approximately 113 to 94 million years before present. Histological analysis of a thin-sectioned osteon from a femoral fragment, examining lines of arrested growth, determined the individual's age at death to be approximately two years. Based on allometric scaling from related taxa, an adult Doolysaurus might have attained twice the mass of the juvenile holotype.
Comparative osteological analysis confirms its classification within the Thescelosauridae family, a clade of small, bipedal, herbivorous-to-omnivorous ornithischian dinosaurs known from Cretaceous deposits in both East Asia and North America. The potential presence of filamentous integumentary structures aligns with morphological inferences for other members of this group.
A supplementary discovery within the fossil block was an assemblage of over forty lithic fragments, ranging from 2 to 10 millimeters in diameter, commingled with the skeletal remains. These are identified as gastroliths, or gastric mill stones. Herbivorous and omnivorous dinosaurs intentionally ingested such stones to facilitate the mechanical breakdown of fibrous plant material within a muscular gizzard, an adaptation convergent with modern avian and crocodilian digestive systems.
The granulometry and morphology of these gastroliths support the hypothesis of an omnivorous diet for Doolysaurus, likely encompassing vegetation, insects, and other small invertebrates. Notably, the initial observation of a cluster of these stones on the surface of the rock matrix prompted the decision to pursue tomographic scanning. Julia Clarke explained the taphonomic implications:
A little cluster of stomach stones, with two leg bones sticking out, indicates that the animal was not fully pulled apart before it has hit the fossil record. So, I encouraged [Jung and co-authors Minguk Kim and Hyemin Jo] to visit Texas and the University of Texas High-Resolution X-ray Computed Tomography (UTCT) [facility], to try scanning the fossil.
The discovery of Doolysaurus, largely articulated within its lithic tomb, suggests potential for further skeletal fossil discoveries in similar Korean formations. Jongyun Jung advocates for the continued application of micro-CT technology as a non-destructive methodology for probing other concretions and revealing concealed paleontological specimens.
In summation, paleontologists have described a new juvenile dinosaur from the Korean Cretaceous, an omnivorous thescelosaurid named for a beloved cartoon character. The integration of cultural homage with rigorous scientific analysis, facilitated by advanced imaging technology, has yielded significant insights into the morphology, diet, and preservation of this Mesozoic organism.