云贵交界地区鳍龙类(爬行动物纲:鳍龙超目)的新属种短头勺齿龙
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本文为贵州省科技计划项目(编号:黔科合平台ZSYS〔2024〕002、黔科合支撑\[2022\]一般257),贵州省省级地质勘查专项资金(编号:黔自然资函〔2024〕42号)的成果


A new Sauropterygian (Reptilia: Sauropterygia) Spatulidentatus breviceps gen. et sp. nov. from Middle Triassic in border area of Yunnan and Guizhou
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    摘要:

    本文简要报道了西南云贵交界地区中三叠世关岭组上段的一鳍龙类新属种:短头勺齿龙(Spatulidentatus breviceps)。该属种鉴定特征为头部短小,占身体全长的5%;上下颌牙齿呈勺形;背部及尾部神经棘高;肩胛骨背翼极为发育;乌喙骨近椭圆形;肱骨远端膨大发育明显的关节窝。初步对比分析显示该种与鳍龙类的基干类群如楯齿龙类、滤齿龙可能有较近的亲缘关系。

    Abstract:

    This paper briefly reports a new genus and species of Sauropterygia, Spatulidentatus breviceps, from the Upper Member of the Middle Triassic Guanling Formation in the border area between Yunnan and Guizhou in Southwest China. The new species can be diagnosed by following characteristics: a mall head, accounting for 5% of the total body length; spatulate teeth in both upper and lower jaws; elongated neural spines in dorsal and tail region; a well- developed scapular dorsal wing; a sub- oval coracoid; and a distinctly expanded distal humerus with well- developed condyle. Preliminary comparative analysis shows that the new species may have a relatively close relationship with the basal groups of Sauropterygia, such as Placodontia and Atopodentatus.

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杨梅,秦燕娇,张银峰,贺箫,李纪.2025.云贵交界地区鳍龙类(爬行动物纲:鳍龙超目)的新属种短头勺齿龙[J].地质论评,71(6):2025060013,[DOI].
YANG Mei, QIN Yanjiao, ZHANG Yinfeng, HE Xiao, LI Ji.2025. A new Sauropterygian (Reptilia: Sauropterygia) Spatulidentatus breviceps gen. et sp. nov. from Middle Triassic in border area of Yunnan and Guizhou[J]. Geological Review,71(6):2025060013.

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历史
  • 收稿日期:2024-09-08
  • 最后修改日期:2025-05-24
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  • 在线发布日期: 2025-11-18
  • 出版日期: 2025-11-15