A Carcharodontosaurid tooth from the Hasandong Formation (Lower Cretaceous) of South Korea
Keywords:Theropoda, Carcharodontosauridae, Daedo Island, Hadong County
A large tooth of theropod dinosaur that was recovered from the Hasandong Formation (Lower Cretaceous; Aptian-Albian) in Daedo island, Hadong Couty, South Gyeongsang Province of South Korea is redescribed. Although the tooth was misidentified as a "Prodeinodon"-like megalosaurid theropod at the first time, detailed comparisons with known theropod dentition anatomy strongly indicate that this tooth belongs to an Acrocanthosaurus-like basal carcharodontosaurid theropod. This referral is supported by its combination of large size, ovoid-shaped cervix outline, mesial carina that does not reach the cervix, labially displaced distal carina and large number of denticles. This tooth is different from other carcharodontosaurid teeth from the same formation in several anatomical aspects (e.g., smaller overall size, presence of transverse lines adjacent to the distal carina, presence of interdenticular sulci in distal carina, denticle densities, crown basal ratio), indicating that carcharodontosaurid diversity in the Early Cretaceous of Korea could have been higher, although these differences may represent positional or individual variations. The presence of Acrocanthosaurus-like theropod teeth (e.g., "Prodeinodon", "Wakinosaurus") from early Cretaceous deposits (Valanginian-Cenomanian) of South Korea, Japan, Mongolia and China indicates that North American Acrocanthosaurus atokensis possibly represents a form that immigrated from the Asia.
Averianov, A.O., Skutschas, P.P. 2009. Additions to the Early Cretaceous dinosaur fauna of Transbaikalia, eastern Russia. Proceedings of the Zoological Institute of the Russian Academy of Sciences, v. 313, p. 363-378.
Carrano, M.T., Benson, R.B.J., Sampson, S.D. 2012. The phylogeny of Tetanurae (Dinosauria: Theropoda). Journal of Systematic Palaeontology, v, 10, p. 211-300. https://doi.org/10.1080/14772019.2011.630927
Choi, S., Lee, Y.-N. 2017. A review of vertebrae body fossils from the Korean Peninsula and perspectives. Geosciences Journal, v. 21, p. 867-889. https://doi.org/10.1007/s12303-017-0040-6
D'Emic, M.D., Melstrom, K.M., Eddy, D.R. 2012. Paleobiology and geographic range of the large-bodied Cretaceous theropod dinosaur Acrocanthosaurus atokensis. Palaeogeography, Palaeoclimatology, Palaeoecology, v. 333-334, p. 13-23. https://doi.org/10.1016/j.palaeo.2012.03.003
Farke, A.A., Maxwell, W.D., Cifelli, R.L., Wedel, M.J. 2014. A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia. PLoS ONE, v. 9(12), e112055. https://doi.org/10.1371/journal.pone.0112055
Hasegawa, Y., Murata, M., Wasada, K., Manabe M. 1992. The First Carnosaur (Saurischia; Theropoda) from Japan: a Tooth from the Cenomanian Mifune Group of Kyushu. Science Reports of the Yokohama National University, v. 2, p. 41-49.
Hendrickx, C., Mateus, O. 2014. Abelisauridae (Dinosauria: Theropoda) from the Late Jurassic of Portugal and dentition-based phylogeny as a contribution for the identification of isolated theropod teeth. Zootaxa, v. 3759, p. 1-74. https://doi.org/10.11646/zootaxa.3759.1.1
Hendrickx, C., Mateus, O., Araújo, R. 2015a. The dentition of megalosaurid theropods. Acta Palaeontologica Polonica, v. 60(3), p. 627-642. https://doi.org/10.4202/app.00056.2013
Hendrickx, C., Mateus, O., Araújo, R. 2015b. A proposed terminology of theropod teeth (Dinosauria: Saurischia). Journal of Vertebrate Paleontology, v. 35(5), e982797. https://doi.org/10.1080/02724634.2015.982797
Hendrickx, C., Mateus, O., Araújo, R., Choiniere, J. 2019. The distribution of dental features in non-avian theropod dinosaurs: Taxonomic potential, degree of homoplasy, and major evolutionary trends. Palaeontologia Electronica, v. 22(3), p. 1-110. https://doi.org/10.26879/820
Hendrickx, C., Stiegler, J., Currie, P. J., Han, F., Xu, X., Choiniere, J., Wu, X.-C. 2020. Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China. Canadian Journal of Earth Sciences. https://doi.org/10.1139/cjes-2019-0231
Kirkland, J.I., Cifelli, R.L., Britt, B.B., Burge, D.L., DeCourten, F.L., Eaton, J.G., Parrish, J.M. 1999. Distribution of vertebrate faunas in the Cedar Mountain Formation, east-central Utah. Miscellaneous Publication of Utah Geological Survey, v. 99, p. 201-217.
Lee, T.-H., Park, K.-H., Yi, K. 2018. Nature and evolution of the Cretaceous basins in the eastern margin of Eurasia: a case study of the Gyeongsang Basin, SE Korea. Journal of Asian Earth Sciences, v. 166, p. 19-31. https://doi.org/10.1016/j.jseaes.2018.07.004
Lee, Y.-N. 2003. Dinosaur bones and eggs in South Korea. Memoir of the Fukui Prefectural Dinosaur Museum, v. 2, p. 113-121.
Lee, Y.-N. 2007. New theropod teeth from the Juji Island (Hasandong Formation), Daedo-ri, Hadong County, South Gyeongsang Province. Journal of the Geological Society of Korea, v. 43, p. 151-166.
Lee, Y.-N. 2008. The first tyrannosauroid tooth from Korea. Geosciences Journal, v. 12, 19-24. https://doi.org/10.1007/s12303-008-0003-z
Lim J.-D., Martin, L.D., Baek, K.-S. 2002. The first megalosaurid tooth from South Korea. Current Science, v. 82, p. 326-328.
Marsh, O. 1878. Notice of new dinosaurian reptiles. American Journal of Science, v. 15, 241-244. https://doi.org/10.2475/ajs.s3-15.87.241
Matsuoka, H., Kusuhashi, N., Takada, T., Setoguchi, T. 2002. A clue to the Neocomian vertebrate fauna: initial results from the Kuwa-jima "Kaseki-kabe" (Tetori Group) in Shiramine, Ishikawa, central Japan. Memoirs of the Faculty of Science, Kyoto University, Series of Geology and Mineralogy, v. 59, p. 33-45.
Mo, J., Huang, C., Xie, S., Buffetaut, E. 2014. A megatheropod tooth from the Early Cretaceous of Fusui, Guangxi, Southern China. Acta Geologica Sinica, v. 88, p. 6-12. https://doi.org/10.1111/1755-6724.12177
Okazaki, Y. 1992. A new genus and species of carnivorous dinosaur from the Lower Cretaceous Kwanmon Group, Northern Kyushu. Bulletin of the Kitakyushu Museum of Natural History, v. 11, p. 87-90.
Osborn, H.F. 1924. Sauropoda and Theropoda from the Lower Cretaceous of Mongolia. American Museum Novitates, v. 128, p. 1-7.
Russell, D.A. 1993. The role of Central Asia in dinosaurian biogeography. Canadian Journal of Earth Sciences, v. 30, p. 2002-2012. https://doi.org/10.1139/e93-176
Sereno, P.C., Brusatte, S.L. 2008. Basal abelisaurid and carcharodontosaurid theropods from the Lower Cretaceous Elrhaz Formation of Niger. Acta Palaeontogica Polonica, v. 53(1), p. 15-46. https://doi.org/10.4202/app.2008.0102
Smith, J.B. 2005. Heterodonty in Tyrannosaurus rex: implications for the taxonomic and systematic utility of theropod dentitions. Journal of Vertebrate Paleontology, v. 25, p. 865-887. https://doi.org/10.1671/0272-4634(2005)025[0865:HITRIF]2.0.CO;2
Smith, J.B., Vann, D.R., Dodson, P. 2005. Dental morphology and variation in theropod dinosaurs: Implications for the taxonomic identification of isolated teeth. The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology, v. 285, p. 699-736. https://doi.org/10.1002/ar.a.20206
Soto, M., Torino, P., Perea D. 2020. A large sized megalosaurid (Theropoda, Tetanurae) from the late Jurassic of Uruguay and Tanzania. Journal of South American Earth Sciences, v. 98, p. 102458. https://doi.org/10.1016/j.jsames.2019.102458
Stromer, E. 1931. Wirbeltiere-Reste der Baharijestufe (unterestes Canoman). Ein Skelett-Rest von Carcharodontosaurus nov. gen. Abhandlungen der Bayerischen Akademie der Wissenschaften, Mathematisch-naturwissenschaftliche Abteilung, v. 9, p. 1-23.
Weishampel, D.B., Barrett, P.M., Coria, R.A., Loeuff, J.L., Xing, X., Xijin, Z., Sahni, A., Gomani, E.M.P., Noto, C.R. 2004. Dinosaur Distribution. in Weishampel, D.B., Dodson, P., Osmólska, H., eds., The Dinosauria, 2nd ed.: University of California Press, Berkeley, p. 517-606. https://doi.org/10.1525/california/9780520242098.003.0027
Yang, S.Y. 1982. Geology around the type-locality of Trigonioides kodairai and age of the Nagdong Subgroup. Journal of the Geological Society of Korea, v. 18, p. 67-72.
Yun, C.S., Baek, K.S., Jeong, Y.H. 2007. Cretaceous reptilian teeth from the Gyeongsang Basin. Journal of the Paleontological Society of Korea, v. 23, p. 27-47.
Yun, C-G. 2019. Comments on the ecology of Jurassic theropod dinosaur Ceratosaurus (Dinosauria: Theropoda) with critical reevaluation for supposed semiaquatic lifestyle. Volumina Jurassica, v. 17, p. 111-116.
How to Cite
Copyright on any research article in the Mongolian Geoscientist is retained by the author(s).
The authors grant the Mongolian Geoscientist a license to publish the article and identify itself as the original publisher.
Articles in the Mongolian Geoscientist are Open Access articles published under a Creative Commons Attribution 4.0 International License CC BY.
This license permits use, distribution and reproduction in any medium, provided the original work is properly cited.