Abstract The supercontinent Pangea was mainly formed during the Permian, but when it reached maximum land is unsure because the configuration of the East Asian blocks during the Permo-Triassic is still highly debated. Fossil tetrapods provide one of the best calibrations to the time of connection between continents, but the data of Permo-Triassic tetrapods have rarely been applied in the previous reconstructions. Here we review the oldest records of non-marine tetrapods on the East Asia blocks and use them to discuss the timing of connection between continents during the Permian and Triassic. The distribution of Seymouriamorpha shows the Kazakhstanian was connected to the Baltica by land from the Cisuralian. The diverse Dashankou Fauna indicates that the Alxa Block amalgamated to Pangea at least in the Guadalupian (older than 266 Ma). The questionable footprints and late Permian dicynodont assemblage from the North China show the North China Craton may have been connected to the main part of Pangea from the Guadalupian, and became part of Pangea at least by 256 Ma. The late Permian Laotian tetrapods support the hypothesis that the South China Block already collided with the North China and the Indochina blocks by the end of the Permian, and there was a land route for the migration of non-marine tetrapods.

中文翻译：

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利用二叠纪-三叠纪非海相四足动物记录约束盘古东缘部分块体的组装时间

摘要 超大陆盘古大陆主要形成于二叠纪，但何时达到最大陆地尚不确定，因为二叠纪-三叠纪东亚地块的构造仍存在很大争议。化石四足动物为大陆之间的连接时间提供了最好的校准之一，但二叠纪-三叠纪四足动物的数据很少应用于以前的重建。在这里，我们回顾了东亚地块上最古老的非海洋四足动物记录，并用它们来讨论二叠纪和三叠纪大陆之间连接的时间。Seymouriamorpha 的分布表明，哈萨克斯坦人通过陆路从 Cisuralian 连接到波罗的海。大山口动物群的多样性表明阿拉善地块至少在瓜达卢阶（早于 266 Ma）并入了盘古大陆。来自华北的可疑脚印和晚二叠世二齿兽类组合表明华北克拉通可能从瓜达鲁普阶与盘古大陆的主要部分相连，并至少在 256 Ma 成为盘古大陆的一部分。二叠纪晚期的老挝四足动物支持了华南地块在二叠纪末与华北和印度支那地块发生碰撞的假说，存在非海洋四足动物迁徙的陆路通道。