Sauropod Teeth from the Lower Cretaceous Luohandong Formation of Ordos Basin, Inner Mongolia
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We thank Mr. Cui Guihai for preparing these specimens. This study is funded by the National Natural Science Foundation of China (Grant No.41372026), and China Geological Survey (Grant Nos. DD20160120, 12120114026801 ).

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    Abstract:

    The Early Cretaceous Zhidan Group in the northern Ordos Basin, Inner Mongolia, yielded a large number of tetrapods, including turtles, choristoderes, crocodyliforms, psittacosaurs, stegosaurs, theropods and birds. Well-preserved sauropod teeth have been found in the Luohandong Formation, a middle-upper unit of the Zhidan Group. The large V-shaped wear facet, low slenderness index value, labial grooves, lingual ridge and concavity on the tooth crown suggest that these teeth are from titanosauriforms. Moreover, the presence of the prominent bosses on the lingual side of the tooth crown indicates these teeth should be identified as Euhelopus teeth further. The existence of Euhelopus in Ordos Basin (Inner Mongolia), Shandong Province and western Liaoning Province shows some connections about vertebrate faunas during Early Cretaceous in these areas. Other tetrapod groups such as turtles (Sinemys, Ordosemys), choristoderes (Ikechosaurus), psittacosaurs (Psittacosaurus) and birds (Cathayornis) provide more evidences for this viewpoint.

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HOU Yandong, ZHANG Lifu, JIANG Shan, JI Shu-an.2017. Sauropod Teeth from the Lower Cretaceous Luohandong Formation of Ordos Basin, Inner Mongolia[J]. Acta Geologica Sinica(),91(3):791-796

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History
  • Received:June 22,2016
  • Revised:November 22,2016
  • Adopted:
  • Online: June 08,2017
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