中国东北地区早白垩世无尾两栖类化石一新属  

A new Early Cretaceous Anuran amphibian from Northeast China

作　　者：谭锴[1] 卢立伍[1] 陈晓云[1] 靳悦高[1] TAN Kai;LU Liwu;CHEN Xiaoyun;JIN Yuegao(Geological Museum of China,Beijing 100034,China)

机构地区：[1]中国地质博物馆,北京100034

出　　处：《地质通报》2018年第10期1783-1788,共6页Geological Bulletin of China

基　　金：国家自然科学基金项目<内蒙古鄂尔多斯地区早白垩世脊椎动物群及相关地层对比>(批准号:41372026)

摘　　要：描述了发现于中国东北地区中生代地层中的蛙类化石一新属、新种,即莫旗蒙蟾(新属、新种)Mengbatrachus moqi gen. et sp. nov.。化石产于内蒙古自治区最东部与黑龙江省相邻的莫旗。该类化石的的主要特征如下:头宽大于头长,上颌骨和前颌骨具有密集排列的牙齿;两鼻骨在中线相接;副蝶骨长条状;翼骨较大,鳞骨、上肩胛骨发育,乌喙骨近端膨大显著;荐前椎8个,脊椎横突发育;第Ⅱ—Ⅳ荐前椎具有短粗肋骨;肋骨单头,近端膨大;荐椎横突呈近似棒状,远端仅稍加宽;尾杆骨上有一对椎后横突;胫跗骨和腓跗骨仅在近端和远端愈合。这是除辽蟾外,在中国发现的另一新的中生代无尾两栖类化石。This paper describes a new genus of Early Cretaceous batrachian fossil discovered in Longjiang Group in Daur Autono.mous Banner of Morin Dawa,east Inner Mongolia.The new type mainly has the following characteristics:The width is longer than the length of its head.There are lots of teeth on the maxillary and the premaxillary.Two nasals are connected in the middle line.The parasphenoid is like a stripe.The pterygoid is big.The squamosal and the surpascapula are all preserved well.The near-end place of the coracoid is obviously intumescentia.The new specimen has 8 opisthocoelous presacrals with developed transverse processes,and its second to the fourth presacrals have free ribs.Only the near-end places of the ribs are intumescentia.The sacral has hatchetshaped transverse processes.The urostyle has transverse processes at the near-end place.The tibiale and the fibulare cicatrize only at the near-end and the far-end places.This specimen is another new discovery of Mesozoic anuran fossils in China,in addition to Liaobatrachus.

关 键 词：无尾两栖类 中生代 中国东北 

分 类 号：P534.53[天文地球—古生物学与地层学] Q915.863[天文地球—地质学]