Koreanosaurus Explained

Koreanosaurus is a genus of orodromine neornithischian dinosaur. One species has been described, Koreanosaurus boseongensis.

Discovery

In 2003, three specimens of Koreanosaurus were found in the Late Cretaceous-age Seonso Conglomerate from the southern coast of the Bibong-ri dinosaur egg site, Boseong, Korean Peninsula.[1] These specimens include the holotype KDRC-BB2, a partial upper skeleton lacking the skull, and two additional specimens which contains portions of the pelvic girdle and lower leg (KDRC-BB1 and KDRC-BB3).[2] The type species was named after its locality (Boseong site 5). This taxon was initially named and described in a master's thesis by Dae-Gil Lee in 2008,[3] and was officially published by Min Huh, Dae-Gil Lee, Jung-Kyun Kim, Jong-Deock Lim and Pascal Godefroit in 2011.[2]

Description

Koreanosaurus was a relatively small dinosaur, reaching 2- in body length.[4] [5] Based on its taxonomic position and the existence of small burrows from the Seonso Conglomerate, Koreanosaurus is likely a burrowing dinosaur. Unlike its orodromine relatives, Koreanosaurus is assumed to have been a quadruped.[6]

Classification

Koreanosaurus was considered to be a basal member of the Ornithopoda by the authors, forming a clade with Zephyrosaurus schaffi, Orodromeus makelai and Oryctodromeus cubicularis from which they deduced a burrowing lifestyle.[2] In 2012, Han et al. found it plausible that Koreanosaurus might be a member of Jeholosauridae or closely related to it.[7] Subsequent phylogenetic analyses by researchers including Han et al. consistently classified Koreanosaurus as a member of Thescelosauridae,[8] specifically within the subfamily Orodrominae.[9] [10] [11] [12]

Notes and References

  1. News: 2010-11-01 . ko:전남대 허민 교수팀, 한국 이름명 공룡 복원 . ko . . http://app.yonhapnews.co.kr/YNA/Basic/article/new_search/YIBW_showSearchArticle.aspx?searchpart=article&searchtext=%ED%95%9C%EA%B5%AD%20%EC%9D%B4%EB%A6%84%EB%AA%85%20%EA%B3%B5%EB%A3%A1%20%EB%B3%B5%EC%9B%90&contents_id=AKR20101101147300054 . dead . 2011-05-04 . https://web.archive.org/web/20111002085355/http://app.yonhapnews.co.kr/YNA/Basic/article/new_search/YIBW_showSearchArticle.aspx?searchpart=article&searchtext=%ED%95%9C%EA%B5%AD%20%EC%9D%B4%EB%A6%84%EB%AA%85%20%EA%B3%B5%EB%A3%A1%20%EB%B3%B5%EC%9B%90&contents_id=AKR20101101147300054 . 2011-10-02.
  2. Min Huh . Dae-Gil Lee . Jung-Kyun Kim . Jong-Deock Lim . Pascal Godefroit . 2011. A new basal ornithopod dinosaur from the Upper Cretaceous of South Korea . Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 259 . 1 . 1–24 . 10.1127/0077-7749/2010/0102.
  3. Lee G., 2008, The ornithopod dinosaur (Ornithopoda: Hypsilophodontidae) from the Late Cretaceous Seonso Conglomerate of Boseong County, Korea, Master's thesis, Chonnam National University
  4. Web site: Huh. M.. Kim. J.G.. 2010. Koreanosaurus boseongensis. 한국고생물학회 정기총회 및 학술발표회. 21-26. ko.
  5. Book: Holtz, Thomas R. Jr. . 2012 . Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages . Winter 2011 Appendix.
  6. Fearon. J.L.. Varricchio. D.J.. 2015. Morphometric analysis of the forelimb and pectoral girdle of the Cretaceous ornithopod dinosaur Oryctodromeus cubicularis and implications for digging. Journal of Vertebrate Paleontology. 35. 4. e936555. 10.1080/02724634.2014.936555.
  7. Han, F.-L. . Barrett, P.M. . Butler, R.J. . Xu, X. . 2012 . Postcranial anatomy of Jeholosaurus shangyuanensis (Dinosauria, Ornithischia) from the Lower Cretaceous Yixian Formation of China. . Journal of Vertebrate Paleontology . 32 . 6 . 1370–1395 . 10.1080/02724634.2012.694385 . 86754247 .
  8. Han, F.-L. . Forster, C.A. . Xu, X. . Clark, J.M. . 2017 . Postcranial anatomy of Yinlong downsi (Dinosauria: Ceratopsia) from the Upper Jurassic Shishugou Formation of China and the phylogeny of basal ornithischians . Journal of Systematic Palaeontology . 16 . 14 . 1159–1187 . 10.1080/14772019.2017.1369185 . 90051025 .
  9. The systematic relationships and biogeographic history of ornithischian dinosaurs . Boyd, C.A. . PeerJ . 2015 . 3 . e1523 . e1523 . 10.7717/peerj.1523. 4690359 . 26713260 . free .
  10. Madzia. Daniel. Boyd. Clint A.. Mazuch. Martin. A basal ornithopod dinosaur from the Cenomanian of the Czech Republic. Journal of Systematic Palaeontology. 16. 11. 2017. 967–979. 10.1080/14772019.2017.1371258 . 90008574.
  11. Dieudonné PE, Cruzado-Caballero P, Godefroit P, Tortosa T . A new phylogeny of cerapodan dinosaurs . Historical Biology . 2020 . 33 . 10 . 2335–2355 . 10.1080/08912963.2020.1793979 .
  12. Fonseca . A. O. . Reid . I. J. . Venner . A. . Duncan . R. J. . Garcia . M. S. . Müller . R. T. . 2024 . A comprehensive phylogenetic analysis on early ornithischian evolution . Journal of Systematic Palaeontology . 22 . 1 . 2346577 . 10.1080/14772019.2024.2346577 .

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