A new basal ornithopod dinosaur from the Upper Cretaceous of South Korea

作者：Huh Min; Lee Dae Gil; Kim Jung Kyun; Lim Jong Deock; Godefroit Pascal^*

来源：Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen, 2010, 259(1): 1-24.

DOI：10.1127/0077-7749/2010/0102

• Boseong
• Korea
• Late Cretaceous
• Koreanosaurus boseongensis nov gen., nov sp.
• dinosaurs
• basal ornithopods

The Seonso Conglomerate (?Santonian - Campanian, Late Cretacous) of Boseong site 5 (southern coast of Korean Peninsula) has yielded well-preserved postcranial material belonging to a new taxon of ornithischian dinosaur, Koreanosaurus boseongensis nov. gen., nov. sp. This dinosaur is characterized by elongated neck vertebrae, very long and massive scapulocoracoid and humerus, proportionally short hindlimbs with a low hindlimb ratio for tibia/femur, and anteroposteriorly-elongated femoral head forming an obtuse 135 angle with the femoral shaft. Koreanosaurus displays a series of neornithischian synapomorphies. Amongst Neornithischia, most features of the postcranial skeleton suggest affinities with basal ornithopods and, amongst them, particularly with a small clade formed by three genera from the Cretaceous of Montana: Zephyrosaurus schaffi, Orodromeus makelai, and Oryctodromeus cubicularis. According to the morphological, phylogenetic, sedimentological, and taphonomic data at hand, it is tentatively postulated that Koreanosaurus was a burrowing dinosaur, like Oryctodromeus.

• 出版日期2010-10