‘Microsaurs’ are traditionally considered to be lepospondyl non‐amniotes, but recent analyses have recovered a subset of ‘microsaurs’, the fossorially adapted Recumbirostra, within Amniota. This novel conclusion highlights the need for additional work to evaluate these competing hypotheses with the aim of refining the phylogenetic position of ‘microsaurs’. Of particular importance in this regard is the placement of potential close relatives of recumbirostrans to determine whether they support an early, stepwise acquisition of the derived morphology seen in recumbirostrans for a fossorial lifestyle, or whether this morphology is the result of evolutionary convergence. Asaphestera intermedia is part of a diverse ‘microsaur’ assemblage preserved at the famous Pennsylvanian Joggins locality in Nova Scotia, Canada. As part of a broader exploration of ‘microsaur’ taxonomy, we find that the material assigned to this taxon is a composite of a synapsid (herein Asaphestera platyris), indeterminate tetrapod material named ‘Hylerpeton’ intermedium (a nomen dubium not referable to Hylerpeton), and the newly recognized recumbirostran Steenerpeton silvae gen. et sp. nov. Further, Archerpeton anthracos from the same site must at present be considered a nomen dubium and may or may not be a ‘microsaur’. Recognition of Asaphestera platyris as a synapsid provides the earliest unambiguous evidence of ‘mammal‐like reptiles’ in the fossil record.

中文翻译：

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重新评估新斯科舍省乔金斯（Joggins）的历史性“微型蜥蜴”，揭示了最早的羊膜生态系统中隐藏的多样性

传统上将“微型蜥蜴”视为Leponpondyl non-amniotes，但最近的分析已在羊膜菌中发现了一部分“微型蜥蜴”（fossoriallylyally Recumbirostra）。这个新颖的结论凸显了需要进行额外的工作来评估这些相互竞争的假设，以期完善“微蜥蜴”的系统发育位置。在这方面，尤为重要的是放置潜在潜在近亲，以确定它们是否支持早期，逐步获取在新生代中观察到的特定形态的衍生形态，或者该形态是否是进化趋同的结果。中间细孢杆菌是在加拿大新斯科舍省著名的宾夕法尼亚州乔金斯地区保存的各种“微型刀”组合的一部分。作为对“微saur”分类法更广泛研究的一部分，我们发现分配给该分类单元的材料是突触体（此处为Asaphestera platyris）的复合材料，不确定的四足动物材料称为“ Hylerpeton ”中间体（一种不称Hylerpeton的nob dubium） ，以及新近认可的recumbirostran Steenerpeton silvae gen。等。十一月 此外，目前必须将来自同一地点的Archerpeton anthracos视为nomen dubium，并且可能是也可能不是“ microsaur”。认可作为一种突触体的白僵菌（Asaphestera platyris）为化石记录中的“类哺乳动物爬行动物”提供了最早的明确证据。