首页|Early-diverging Titanosauriform(Dinosauria,Sauropoda)Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia,Northeast China

Early-diverging Titanosauriform(Dinosauria,Sauropoda)Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia,Northeast China

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  • 国家科技期刊平台
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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.

teethTitanosauriformesLower CretaceousYixian FormationNingcheng

ZHANG Honggang、YIN Yalei、PEI Rui、ZHOU Changfu

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College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266570,China

College of Paleontology,Shenyang Normal University,Shenyang 110034,China

Key Laboratory of Evolution of Past Life in NE Asia,Ministry of Natural Resources,Shenyang 110034,China

Key Laboratory of Evolutionary Systematics of Vertebrates,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China

CAS Center for Excellence in Life and Paleoenvironment,Beijing 100044,China

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Scientific Research Foundation of Shenyang Normal UniversityProgram for Innovative Research Team of Excellent Talents in University of Shandong ProvinceTaishan Scholar Program of Shandong ProvinceEducational Department of Liaoning ProvinceShandong Provincial Natural Science FoundationNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

BS2022072019KJH004tsqn201812070JYTQN2023422ZR2017MD031419720254168810342161134003

2024

10.1111/1755-6724.15169

地质学报(英文版)
中国地质学会

地质学报(英文版)

CSTPCD
影响因子：1.414
ISSN：1000-9515
年,卷(期)：2024.98(2)
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