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''Heyuannia'' ("Heyuan one") is a genus of oviraptorid dinosaur that lived during the Late Cretaceous Period in China. It was the first oviraptorid found in that country; most others were found in neighbouring Mongolia. The type species, ''Heyuannia huangi'', was named and described by Lü Junchang in 2002. The generic name refers to the city of Heyuan. The specific name honours Huang Dong, the director of the Heyuan Museum. The holotype, HYMV1-1, was discovered in Guangdong near Huangsha in layers of the Dalangshan Formation. It consists of a partial skeleton, including the skull. Six further skeletons were assigned as paratypes or referred to the species. Multiple other fossils have been found, including one which may retain possible reproductive organs. Also, many thousands of eggs have been uncovered at the site, some of them of a theropod type and likely laid by ''Heyuannia''.〔Lü, J. (2002). "A new oviraptorosaurid (Theropoda: Oviraptorosauria) from the Late Cretaceous of southern China." ''Journal of Vertebrate Paleontology'' 22, 871-875.〕 ''Heyuannia'' is a medium-sized oviraptorid. Gregory S. Paul in 2010 estimated its length at 1.5 metres, the weight at twenty kilograms.〔Paul, G.S., 2010, ''The Princeton Field Guide to Dinosaurs'', Princeton University Press p. 154〕 Its toothless skull is relatively short with a steep snout. It had very short arms and digits, and its first digit was reduced.〔Lü, J. (2005). ''Oviraptorid dinosaurs from Southern China.'' Beijing: Geological Publishing House. ISBN 7-116-04368-3. 200 pages + 8 plates. (In Chinese: pp 1-83, including 36 figures & 3 tables. In English: pp 85-200, including 5 geological figures.)〕 ''Heyuannia'' was assigned by Lü to the Oviraptoridae in 2002 . Its exact placement within this group is uncertain. Later analyses either resulted in a position in the Oviraptorinae or the Ingeniinae. According to Lü the morphology of the shoulder girdle of ''Heyuannia'' supports the hypothesis that oviraptosaurians were secondarily flightless birds.〔Lü J., Huang D. and Qiu L., 2005, "The Pectoral Girdle and the Forelimb of ''Heyuannia'' (Dinosauria: Oviraptorosauria)". In: Carpenter (ed.). ''The Carnivorous Dinosaurs''. Indiana University Press. pp 256-273〕 ==See also== * Timeline of oviraptorosaur research 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Heyuannia」の詳細全文を読む スポンサード リンク
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