ABSTRACT Dicynodont therapsids are prominent elements of Triassic continental faunas, but the date of their demise is controversial, linked either to end-Carnian faunal turnover or to end-Triassic mass extinction. The second timing is based on a unique, giant dicynodont-theropod dinosaur fauna from Lipie Śląskie, Poland, thought to be Rhaetian in age, due to conjectural botanical and conchostracan (but not tetrapod) evidence. On the other hand, an age assignment for the Lipie fauna to the mid-Norian (Revueltian) has been demonstrated recently by regional integrative stratigraphic data. To test once more this still debated age assignment, we recall the rationale of Georges Cuvier in the study of the fossil record (‘the best documents of Earth’s past are fossilized large tetrapods’). This approach was applied successfully 200 years ago to the species extinction dilemma. In light of the worldwide distribution of dicynodonts, the alleged compositional paradox of the ‘Rhaetian’ fauna from Poland can be significantly reduced by its recognition as a more ‘normal’ early-middle Norian assemblage. The simple megafaunal correlation appears to be conclusive. Thus, there was a major pulse of dicynodont extinction at the end of the Carnian, with the final extinction of the few remaining species happening in the Norian.

中文翻译：

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根据不寻常的晚三叠世波兰动物群和居维叶的灭绝方法，二齿兽类灭绝的时间

摘要 Dicynodont therapsids 是三叠纪大陆动物群的重要组成部分，但它们死亡的日期是有争议的，与卡尼阶末动物群更替或三叠纪末大灭绝有关。第二个时间是基于来自波兰利皮 Śląskie 的一种独特的巨型二齿兽-兽脚亚目恐龙动物群，由于推测的植物学和叶状体（但不是四足动物）证据，被认为是雷蒂亚时代的。另一方面，最近区域综合地层数据证明了利皮动物群的年龄分配到诺里安中期（Revueltian）。为了再次测试这个仍然存在争议的年龄分配，我们回顾了乔治·居维叶在化石记录研究中的基本原理（“地球过去最好的文献是大型四足动物化石”）。这种方法在 200 年前成功应用于物种灭绝的困境。鉴于二齿兽类在世界范围内的分布，来自波兰的“雷蒂亚”动物群的所谓组成悖论可以通过将其识别为更“正常”的早中期诺利安组合而显着减少。简单的巨型动物相关性似乎是决定性的。因此，在 Carnian 末期出现了二齿兽类灭绝的主要脉搏，而少数剩余物种的最终灭绝发生在 Norian 中。