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New haramiyidan and reptile fossils from a Rhaetian bedded sequence close to the famous ‘Microlestes’ Quarry of Holwell, UK
Proceedings of the Geologists' Association ( IF 1.2 ) Pub Date : 2020-12-15 , DOI: 10.1016/j.pgeola.2020.09.003
David I Whiteside , Christopher J. Duffin

We describe here new Late Triassic haramiyidan mammaliaform and reptile fossils from near the classic ‘Microlestes’ Quarry’ at Holwell, Somerset, U.K., where Charles Moore discovered a huge collection of microvertebrates in the 1850s. Moore’s discoveries included the haramiyid Thomasia (formerly ‘Microlestes’ and Microcleptes) for which he achieved worldwide fame. Subsequently, despite much fossicking by researchers at Holwell, few new identifiable specimens of mammaliamorphs and lepidosaurs have been recorded and these were by Kühne in 1939. The new finds described here from a bedded sequence, not from a fissure, add significantly to our knowledge of the Holwell tetrapods and to the Rhaetian terrestrial faunas of the SW U.K. Our discovery of haramiyidan teeth includes a previously unknown type of Theroteinus, a genus not previously recorded from outside of the St-Nicholas-de-Port locality in France. An archosaur tooth, possibly from a phytosaur, is also recorded. The new lepidosaur specimens add significant detail to the recently described ‘basal’ rhynchocephalian Penegephyrosaurus curtiscoppi as well as demonstrating that the global diversity of Lepidosauria in the Late Triassic remains incompletely known.



中文翻译:

来自英国霍尔霍尔著名的“小小分子”采石场的Rhaetian层序中的新haramiyidan和爬行动物化石

我们在这里描述了来自英国萨默塞特郡霍尔威尔市经典“微石”采石场附近的晚三叠世haramiyidan哺乳动物状和爬行动物化石,查尔斯·摩尔在1850年代在那里发现了大量微脊椎动物。摩尔的发现包括Haramiyid Thomasia(原名“ Microlestes”Microcleptes),他因此而享誉全球。随后,尽管霍尔韦尔大学的研究人员大为烦恼,但很少记录到可辨认的哺乳动物和鳞翅目新标本,这些标本是库恩(Kühne)在1939年提出的。英国西南部的Holwell四足动物和Rheatian陆生动物区系我们发现的haramiyidan牙齿包括一个以前未知的Theroteinus类型,该属以前从未在法国的St-Nicholas-de-Port地方记录过。还记录了可​​能来自植物龙的恐龙牙齿。新的鳞翅目标本为最近描述的“基础”型鼻头颅盘尾龙curtiscoppi增加了重要的细节。 并表明三叠纪晚期的鳞翅目动物的全球多样性仍然不完全为人所知。

更新日期:2020-12-15
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