Sea scorpions (eurypterids) are a group of extinct aquatic chelicerates that have a fossil record spanning the Ordovician through to the end Permian extinction. Due to their size and preservational potential, eurypterids have been well-documented in European and North American deposits, with less evidence from Gondwana. There is particularly limited evidence of the group from the Australian fossil record. To rectify this, we report new examples of pterygotid eurypterids from the late Silurian Wallace Shale and Early Devonian Merrimerriwa Formation, Mulga Downs Group in New South Wales. These specimens are assigned to sp. (Wallace Shale) and c.f. (Merrimerriwa Formation, Mulga Downs Group). The material is used to explore the extensive distribution and dispersal of these large, pelagic eurypterids and consider the position of the animals in their respective paleoecosystems. We conclude that these new records evidence the diversity of larger arthropods in Australian deposits and that ongoing documentation of these rare fossils is required to further understand the Paleozoic of Australia.

中文翻译：

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来自冈瓦纳志留纪和泥盆纪的新型翼状海蝎


海蝎子（Eurypterids）是一组已灭绝的水生螯合物，其化石记录跨越奥陶纪直至二叠纪末期灭绝。由于其体型和保存潜力，欧洲和北美沉积物中对广翅目有详细记录，但来自冈瓦纳古陆的证据较少。澳大利亚化石记录中关于该群体的证据特别有限。为了纠正这个问题，我们报告了来自新南威尔士州Mulga Downs群志留世晚期华莱士页岩和早泥盆世Merrimerriwa组的翼类翼类的新例子。这些标本被分配给 sp。 （Wallace 页岩）和 cf（Merrimerriwa 地层，Mulga Downs 集团）。该材料用于探索这些大型远洋广翅目动物的广泛分布和分散，并考虑这些动物在各自古生态系统中的位置。我们的结论是，这些新记录证明了澳大利亚沉积物中大型节肢动物的多样性，并且需要对这些稀有化石进行持续记录以进一步了解澳大利亚的古生代。