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Upper Emsian Spinelloidea and Cyrtospiriferoidea (Brachiopoda, Spiriferidina) of the Cantabrian Mountains (N Spain)


, : Upper Emsian Spinelloidea and Cyrtospiriferoidea (Brachiopoda, Spiriferidina) of the Cantabrian Mountains (N Spain). Geobios (Villeurbanne). January; 381: 69-97

In the Cantabrian Mountains (NW Spain) a strong difference exists between Emsian articulate brachiopod species diversity compared to that of other remaining Devonian stages (169 Emsian species versus 210 species for the rest of the Devonian). Historical, paleogeographic and eustatic reasons are presented that could in part explain this numerical asymmetry. The Emsian stratigraphy of the Asturo-Leonian domain Emsian is briefly discussed and related to both global bio-events and eustatic and magnetosusceptibility events. Spiriferids are the most diversified Emsian brachiopod group (44 species). Despite this fact only nine of these spiriferid species have adequately been described and/or figured in recent times. This paper focuses on the Asturo-Leonian domain Upper Emsian Spinelloidea and Cyrtospiriferoidea. Nine species (five new) are described and/or figured belonging to six genera (four new). The meaning of the term "crural plates" and its diagnostic value in the taxonomic characterization of the Family Spinellidae is discussed (C) 2005 Elsevier SAS. All rights reserved.

US$19.90

DOI: 10.1016/j.geobios.2003.06.007


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