古脊椎动物学报2013，Vol.51Issue(2)：85-101,17.
内蒙古上白垩统窃蛋龙科一新属种及其地层学意义
A new oviraptorid from the Upper Cretaceous of Nei Mongol,China, and its stratigraphic implications
摘要
Abstract
Here we report a new oviraptorid taxon based on a specimen collected from the Upper Cretaceous Wulansuhai Formation of Bayan Mandahu,Linhe,China.This new taxon is distinguishable from other oviraptorid species by the following unique features:the ventral extremity of the large and elongate external naris is located below the mid-height of the premaxilla,the strap-like jugal process of the maxilla extends well beyond the preorbital bar posteriorly and overlaps the jugal,and the anterodorsal process of the surangular is basally constricted in lateral view.Although diagnosable as an oviraptorid,this new taxon possesses several plesiomorphic features absent in other oviraptorids but reminiscent of more basal oviraptorosaurs,suggesting a relatively basal position within the Oviraptoridae.The infratemporal fenestra has a narrow dorsal border,the anterior and posterior processes of the lacrimal are relatively long,the ectopterygoid is located relatively posteriorly,the external mandibular fenestra is comparatively posterior in position,the scapula is relatively short and slender,the pubic peduncle of the ilium is both more ventrally extended and much wider anteroposteriorly than the ischial peduncle,the ischium is relatively short,and metatarsal Ⅲ is compressed between metatarsals Ⅱ and Ⅳ.This taxon,Wulatelong gobiensis gen.et sp.nov.,is therefore inferred to be a basal oviraptorid.A preliminary analysis of the Bayan Mandahu dinosaur fauna supports the view that the Bayan Mandahu strata are the oldest Upper Cretaceous red beds exposed in the Gobi area of the Mongolian Plateau.关键词
内蒙古巴彦满达呼/上白垩统红层/兽脚类窃蛋龙科Key words
Bayan Mandahu, Nei Mongol, China/Upper Cretaceous red beds/Oviraptoridae,Theropoda分类
生物科学引用本文复制引用
徐星,谭庆伟,王烁,舒柯文,洪大卫,韩凤禄,马檠宇,谭林,肖东..内蒙古上白垩统窃蛋龙科一新属种及其地层学意义[J].古脊椎动物学报,2013,51(2):85-101,17.基金项目
国家自然科学基金重大国际合作项目(批准号:41120124002)、国家重点基础研究发展计划项目(编号:2012CB821900)和内蒙古国土资源厅两全项目资助. （批准号:41120124002）
