Abstract
Three eusauropod teeth(SDUST-V1064,PMOL-AD00176,PMOL-ADt0005)are reported from the Lower Cretaceous Yixian Formation of Ningcheng,southeastern Inner Mongolia,China.Two of them(SDUST-V1064,PMOL-AD00176)are assigned to early-diverging titanosauriforms in having slightly mesiodistal expansion at the base of the tooth crown,a slenderness index value>2.0 and<4.0,and D-shaped cross section.Furthermore,SDUST-V1064 and PMOL-AD00176 are referred as an Euhelopus-like titanosauriform on the basis of having a sub-circular boss on the lingual surface and an asymmetrical crown-root margin which slants apically,respectively.CT scan data of SDUST-V1064 reveals new dental information of early-diverging titanosauriforms,for example,the enamel on the labial side thicker than that on the lingual side,an enamel/dentine ratio of 0.26 and a boss present on the lingual side of the dentine of the crown.
基金项目
Scientific Research Foundation of Shenyang Normal University(BS202207)
Program for Innovative Research Team of Excellent Talents in University of Shandong Province(2019KJH004)
Taishan Scholar Program of Shandong Province(tsqn201812070)
Educational Department of Liaoning Province(JYTQN2023422)
Shandong Provincial Natural Science Foundation(ZR2017MD031)
National Natural Science Foundation of China(41972025)
National Natural Science Foundation of China(41688103)
National Natural Science Foundation of China(42161134003)
国家科技期刊平台
NSTL
万方数据