地质学报2018，Vol.92Issue(4)：629-637,9.
内蒙古鄂托克旗早白垩世龟类化石一新种
A New Early Cretaceous Turtle from Otog Qi, Inner Mongolia, China
摘要
Abstract
Abundant fossil turtles have been known from the Early Cretaceous deposits of the Ordos region,Inner Mongolia.A new species of Sinemys,S.chabuensis sp.nov.,is erected based on a nearly complete turtle carapace that was excavated from the Jingchuan Formation of Otog Qi,Ordos.This species is characterized by its very wide third vertebral scute with its width doubling its length and its length of anterior lateral margin 1.7 times the length of posterior lateral margin,the contact between the paired eighth pleura1 plates at midline,very broad first suprapygal plate,and the very developed lateral spine from the seventh peripheral plate.At least two turtle species have been reported from the Early Cretaceous Jingchuan Formation and other two taxa from the underlying Luohandong Formation from Ordos region,respectively.There appear some successions and differences of the turtles between the two formations.关键词
中国龟属/早白垩世/泾川组/鄂托克旗/鄂尔多斯盆地Key words
Sinemys/Early Cretaceous/Jingchuan Formation/Otog Qi/Ordos Basin引用本文复制引用
姬书安,陈晓云..内蒙古鄂托克旗早白垩世龟类化石一新种[J].地质学报,2018,92(4):629-637,9.基金项目
本文为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”(编号41372026)、中国地质调查局地质调查项目“关键地区区域地层标准建立与关键生物群演化和沉积岩试点填图”(编号DD20160120)资助的成果. （编号41372026）
