内蒙古二连盆地二连组亚洲近颌龙(兽脚类:窃蛋龙类)—未定种（英文）  

Caenagnathasia sp.(Theropoda:Oviraptorosauria)from the Iren Dabasu Formation(Upper Cretaceous:Campanian) of Erenhot,Nei Mongol,China

作　　者：姚熙[1,2] 王孝理[3] 舒柯文[1] 王烁[1,2] ThomasSTIDHAM 徐星[1] 

机构地区：[1]中国科学院脊椎动物演化与人类起源重点实验室中国科学院古脊椎动物与古人类研究所,北京100044 [2]中国科学院大学,北京100049 [3]临沂大学地质与古生物研究所,山东临沂276005

出　　处：《古脊椎动物学报》2015年第4期291-298,共8页Vertebrata Palasiatica

基　　金：supported by the National Natural Science Foundation of China(41120124002 and 41472023);the 973 program(2012CB821900)~~

摘　　要：亚洲近颌龙属(Caenagnathasia)首次报道于乌兹别克斯坦的晚白垩世Bissekty组,时代为土伦阶(Turonian)。报道了发现于内蒙古二连盆地晚白垩世二连大巴苏组的一件下颌联合部分,根据以下特征将这件标本归为亚洲近颌龙属:齿骨完全愈合,齿骨愈合部分未向下倾斜,齿骨背侧边缘的前部侧面观略凹,侧面的咬合面具有舌嵴,舌嵴上具有尖状突起,血管槽和相关的孔未延伸到齿骨愈合部分的背面,具有前部的咬合槽。新的标本将亚洲近颌龙的生存时代和地理分布延伸到了中国的坎潘阶(Campanian)。The oviraptorosaurian theropod Caenagnathasia was first described from the Late Cretaceous （Turonian） vertebrate assemblage from the Bissekty Formation of the Kyzylkum Desert, Uzbekistan. Here we report a partial pair of oviraptorosaurian fused lower jaws, comprising the symphysial region, from the Upper Cretaceous （Campanian） Iren Dabasu Formation of Nei Mongol, China. This mandibular fi＇agment can be referred to Caenagnathasia based on the following shared characters： dentaries fully fused, symphysial portion of dentary not downtumed, anterior part of dorsal margin of dentary broadly concave in lateral view, lingual ridge present at margin of occlusal surface on each dentary, lingual ridge bears apical projection, vascular grooves and associated foramina do not extend to dorsal surface of symphysis, and anterior occlusal groove present. This new specimen extends the temporal and geographic range of Caenagnathasia to the Campanian of China.

关 键 词：内蒙古二连盆地 晚白垩世 二连组 兽脚类 近颌龙科 亚洲近颌龙属 

分 类 号：Q915.864[天文地球—古生物学与地层学]