Doolysaurus
Omnivore/Opportunistic·Cretaceous·South Korea·Unknown
Doolysaurus is an extinct genus of thescelosaurid ornithischian dinosaur discovered in South Korea. It is known from a partial skeleton of a small juvenile individual, making it the first named South Korean dinosaur with diagnostic cranial material. This discovery offers significant insights into the early evolution of thescelosaurid ornithischians in East Asia.
Key Facts
- ›Doolysaurus is known from the Albian–lower Cenomanian stages of the Cretaceous period.
- ›Fossils were discovered in the Ilseongsan Formation of South Korea.
- ›The holotype specimen is a partial skeleton of a juvenile individual.
- ›Its scientific name honors the Korean cartoon character 'Dooly the Little Dinosaur' and paleontologist Min Huh.
- ›Gastroliths found with the specimen suggest an omnivorous or opportunistic diet.
- ›It is classified as a member of the family Thescelosauridae.
- Partial skeleton of a small juvenile individual.
- Estimated weight of 8.3 kg for the juvenile holotype.
- Incomplete fusion and ossification of cranial elements indicate a juvenile state.
- Associated gastroliths were found with the specimen.
Koreanosaurus
South Korea
About Doolysaurus
Doolysaurus: A Glimpse into Early East Asian Ornithischians
Doolysaurus huhmini is an extinct genus of thescelosaurid ornithischian dinosaur that roamed what is now South Korea during the Cretaceous period. Specifically, the genus is known from the Albian to lower Cenomanian stages, placing it in the Early to early Late Cretaceous. The discovery of Doolysaurus is significant as it represents the first named South Korean dinosaur to possess diagnostic cranial material, offering crucial insights into the early evolutionary history of thescelosaurid ornithischians within East Asia. It is also the second named basal neornithischian dinosaur found in South Korea, following Koreanosaurus.
Discovery and Naming
The fossil remains of Doolysaurus were unearthed in 2023 by Hyemin Jo from outcrops of the Ilseongsan Formation on Aphae Island, Shinan, South Korea. The specimen, designated KDRC-SA-V001, is housed at the Korea Dinosaur Research Center of Chonnam National University. This holotype consists of an incomplete yet three-dimensionally preserved skeleton, including parts of the skull, vertebral column, forelimb, and hindlimb. In 2026, Jongyun Jung and his colleagues formally described Doolysaurus huhmini as a new genus and species. The genus name, Doolysaurus, pays homage to 'Dooly the Little Dinosaur,' a beloved Korean cartoon character, combined with the Greek word 'sauros' meaning 'lizard.' The specific epithet, huhmini, honors the contributions of paleontologist Min Huh to dinosaur research in Korea, who founded the Korean Dinosaur Research Center.
Description and Diet
The holotype of Doolysaurus is interpreted as a juvenile individual that was experiencing rapid growth at the time of its death. This is supported by an examination of the femoral cortical tissue and the incomplete fusion of cranial elements. Femoral measurements suggest an estimated weight of approximately 8.3 kg (18 lb) for this young dinosaur. A notable find alongside the skeleton was the recovery of about 40–50 associated gastroliths, weighing around 30.7 grams. Their subrounded shape indicates that Doolysaurus likely possessed an omnivorous or opportunistic diet, utilizing its gizzard to process a variety of food items, potentially including plant material and small prey. This dietary flexibility would have been advantageous in its paleoenvironment.
Paleoenvironment
Doolysaurus inhabited a floodplain environment characterized by crevasse splays, as indicated by the geology of the Ilseongsan Formation. This ecosystem was rich and diverse, supporting various other dinosaur groups such as oviraptorosaurs, therizinosaurs, troodontids, and birds. The presence of Doolysaurus within this environment, with its inferred foraging strategy, further contributes to our understanding of the ecological dynamics of Early to early Late Cretaceous South Korea.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Doolysaurus mean?
The genus name Doolysaurus combines a reference to 'Dooly the Little Dinosaur,' a popular Korean cartoon character, with the Greek word 'sauros,' meaning 'lizard.' The species name, huhmini, honors paleontologist Min Huh for his contributions to dinosaur research in Korea.
When and where was Doolysaurus discovered?
Doolysaurus fossils were discovered in 2023 by Hyemin Jo in outcrops of the Ilseongsan Formation on Aphae Island of Shinan, South Korea. The discovery occurred in rocks dating to the Albian–Cenomanian stages of the Early to early Late Cretaceous.
What type of dinosaur was Doolysaurus?
Doolysaurus was a thescelosaurid ornithischian dinosaur. It is classified within the family Thescelosauridae and is considered a basal member of the subfamily Thescelosaurinae in some phylogenetic analyses.
What did Doolysaurus eat?
The discovery of approximately 40–50 associated gastroliths with the specimen suggests that Doolysaurus may have had an omnivorous or opportunistic diet. The subrounded shape of these stones implies they aided in digesting both plant material and small food items.
How large was Doolysaurus?
The holotype specimen is estimated to have weighed about 8.3 kg (18 lb) based on femoral circumference. The remains belong to a juvenile individual that was likely undergoing rapid growth at the time of its death.
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