{{Taxobox
| color = pink
| name = 瑞欽龍
| status = fossil
| fossil_range = 上白堊紀
| image = Rinchenia mongoliensis profile1.jpg
| image_size = 200px
| regnum = 動物界 Animalia
| phylum = 脊索動物門 Chordata
| classis = 蜥形綱 Sauropsida
| superordo = 恐龍總目 Dinosauria
| ordo = 蜥臀目 Saurischia
| familia = 偷蛋龍科 Oviraptoridae
| genus = '''瑞欽龍屬 ''Rinchenia'''''
| genus_authority = Osmólska ''et al.'', 2004
| species = '''蒙古瑞欽龍 ''R. mongoliensis'''''
| binomial = ''Rinchenia mongoliensis''
| binomial_authority = (Barsbold, 1986)
}}

'''瑞欽龍'''（學名''Rinchenia''）是上白堊紀蒙古的一屬偷蛋龍科恐龍。模式種'''蒙古瑞欽龍'''（''R. mongoliensis''）原先被認為是偷蛋龍屬的一個物種，1986年瑞欽·巴思缽（Rinchen Barsbold）將牠命名為蒙古偷蛋龍（''Oviraptor mongoliensis''）<ref name=barsbold1986></ref>，但於1997年巴思缽重新審核時發現了牠們之間明顯有很多差別，並提出了新的瑞欽龍屬。<ref name=barsbold1997></ref>但是他並沒有作出詳細的描述，故當時此名稱是無效的，直至2004年喬治·奧利舍夫斯基（George Osmólska）重新使用了這個名稱。<ref name=osmolska2004></ref>

瑞欽龍目前僅發現一個標本（編號GI 100/32A），包含一個完整頭骨、下顎、部分脊柱、部分前肢、肩帶、部分後肢、骨盆、叉骨。瑞欽龍與偷蛋龍的大小相近（約1.5米長），但骨骼上的幾個特徵，尤其在頭顱骨上，都有明顯的分別。牠的骨骼較偷蛋龍為輕巧。偷蛋龍有一個與葬火龍相似的低冠，但瑞欽龍的頭顱骨上有高圓拱的盔。<ref name=barsbold1997/>

{{Taxobox
| name = ''Rinchenia''
| fossil_range = Late Cretaceous
| image = Rinchenia mongoliensis profile1.jpg
| image_size = 200px
| image_caption = Profile of ''Rinchenia mongoliensis''.
| regnum = Animalia
| phylum = Chordata
| classis = Sauropsida
| superordo = Dinosauria
| ordo = Saurischia
| familia = Oviraptoridae
| genus = '''''Rinchenia'''''
| genus_authority = Barsbold, 1986 ''vide'' Osmólska ''et al.'', 2004
| subdivision_ranks = Species
| subdivision =
* '''''R. mongoliensis''''' <small>(Barsbold, 1986 [originally ''type)</small>
}}

'''''Rinchenia''''' is a oviraptorid Period. The type (and only known) species, ''Rinchenia mongoliensis'', was originally classified as a species within the genus ''Oviraptor'' (named ''Oviraptor mongoliensis'' by Rinchen Barsbold in 1986<ref name="barsbold1986">Barsbold, R. (1986). "Raubdinosaurier Oviraptoren" [in Russian]. In: O.I. Vorob’eva (ed.), ''Gerpetologičeskie issledovaniâ v Mongol’skoj Narod−noj Respublike'', 210–223. Institut èvolûcionnoj morfologii i èkologii životnyh im. A.N. Severcova, Akademiâ nauk SSSR, Moscow.</ref>), but a re-examination by Barsbold in 1997 found differences significant enough to warrant a separate genus.<ref name="barsbold1997">Barsbold, R. (1997). "Oviraptorosauria." In: P.J. Currie and K. Padian (eds.), ''Encyclopedia of Dinosaurs'', 505–509. Academic Press, San Diego.</ref> The name ''Rinchenia'' was coined for this new genus by Barsbold in 1997, though he did not describe it in detail, and the name remained a ''nomen nudum'' until used by Osmólska ''et al.'' in 2004.<ref name="dinosauria2">Osmólska, H., Currie, P. J., and Barsbold, R. (2004). "Oviraptorosauria." In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.), ''The Dinosauria, Second Edition''. California University Press, 165-183.</ref>

''Rinchenia'' is known from a single specimen (GI 100/32A) consisting of a complete skull and lower jaw, partial vertebral column, partial forelimbs and shoulder girdle, partial hind limbs and pelvis, and a furcula ("wishbone"). While ''Rinchenia'' was about the same size as ''Oviraptor'' (about 1.5 meters, or 5 ft long), several features of its skeleton, especially in the skull, show it to be distinct. It skeleton was more lightly built and less robust than that of ''Oviraptor'', and while the crest of ''Oviraptor'' is indistinct because of poor fossil preservation, ''Rinchenia'' had a well-preserved, highly developed, dome-like casque which incorporated many bones in the skull that are free of the crest in ''Oviraptor''.