A first report of Sphenothallus Hall, 1847 in the Cambrian of Variscan Europe

Oldřich FATKA, Petr KRAFT & Michal SZABAD

en Comptes Rendus Palevol 11 (8) - Pages 539-547

Published on 31 December 2012

Ten specimens of two phosphatic fossils have been recently discovered in lower and middle portions of Middle Cambrian Jince Formation in the Czech Republic. They are attributed to the genus Sphenothallus Hall, 1847 and described as two separate species; comparatively small conchs are described as S. kozaki sp. nov., the much larger specimens characterized by its smooth and partly flexible organo-phosphatic walls of shell are determined as ? S. kordulei sp. nov. Sphenothallus is known to range from Cambrian to Permian and accommodates numerous species. However, its Cambrian distribution is considerably restricted. Generally rare specimens have been described from Lower to Middle Cambrian of Laurentia and from the Lower Cambrian of Gondwana and peri-Gondwana. The new record of Sphenothallus from the Jince Biota represents a notable extension of their geographic range.


Sphenothallus, Middle Cambrian, Jince Formation, Czech Republic, Barrandian area

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