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Late Devonian (Famennian) phacopid trilobites from western Mongolia

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Abstract

The early Famennian phacopid trilobites Feistops mongoliensis gen. nov. sp. nov., Feistops khovdensis gen. nov. sp. nov., ?Feistops sp. A, and ?Houseops olonbulagensis sp. nov. are recorded and illustrated from the western Mongolia Hushoot Shiveetiin gol section from the Baruunhuurai Terrane of the Central Asian Orogenic Belt (CAOB). In this section, exposing large parts of cyclic Famennian shallow-water siliciclastic shelf deposits, Feistops mongoliensis gen. nov. sp. nov., Feistops khovdensis gen. nov. sp. nov., ?Feistops sp. A, and ?Houseops olonbulagensis sp. nov. are the first known and described representatives of trilobites from Late Devonian deposits of western Mongolia. Their affinities with known other sighted species of the same age are discussed.

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Acknowledgements

This is a contribution to a special series on “The Cental Asian Orogenic Belt (CAOB) during Late Devonian: new insights from southern Mongolia.” IGCP 596 and its successor, the Western Mongolian Working Group, have conducted fieldwork in Mongolia with the goal of identifying Late Devonian extinction and anoxia events that were previously recognized in coeval CAOB terranes in western China. This paper is a contribution to IGCP Project 652 (Reading geologic time in Paleozoic rocks: the need for an integrated stratigraphy [2017–2021]). We acknowledge Sersmaa Gonchigdorj in collecting and bringing samples to Europe. We thank Allart van Viersen (Belgium) and Raimund Feist (France) as reviewers for their comments and suggestions.

Funding

The study is financially supported by the German Academic Exchange Service (DAAD, research grant—Doctoral Programme in Germany, September 01, 2018–September 01, 2021; 57381412), the German Science Foundation (DFG, Ko 1622-19/1), National Geographic (CP-113R-17), and Appalachian State University. The authors (CC) thank the Région Hauts–de–France, and the Ministère de l’Enseignement Supérieur et de la Recherche (CPER Climibio) for their financial support.

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This is a contribution to a special series on The Central Asian Orogenic Belt (CAOB) during Late Devonian: new insights from southern Mongolia.

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Crônier, C., Ariuntogos, M., Königshof, P. et al. Late Devonian (Famennian) phacopid trilobites from western Mongolia. Palaeobio Palaeoenv 101, 707–723 (2021). https://doi.org/10.1007/s12549-020-00449-w

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