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Middle Ordovician linguliformean microbrachiopods from western Argentina: new data and biogeographic implications

Published online by Cambridge University Press:  26 March 2021

Fernando J. Lavié Open the ORCID record for Fernando J. Lavié [Opens in a new window] ,
Ana I. Mestre  and
Marcelo G. Carrera Open the ORCID record for Marcelo G. Carrera [Opens in a new window]
Fernando J. Lavié
Affiliation:
CICTERRA (CONICET-Universidad Nacional de Córdoba), Facultad de Ciencias Exactas, Físicas y Naturales, Av. Vélez Sarsfield 1699, X5016GCA, Córdoba, Argentina. ,
Ana I. Mestre
Affiliation:
CONICET – CIGEOBIO – IIM. Facultad de Ingeniería, Universidad Nacional de San Juan, Argentina - Av. Libertador General San Martín 1109, C.P. 5400.
Marcelo G. Carrera
Affiliation:
CICTERRA (CONICET-Universidad Nacional de Córdoba), Facultad de Ciencias Exactas, Físicas y Naturales, Av. Vélez Sarsfield 1699, X5016GCA, Córdoba, Argentina. ,
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Abstract

New linguliform microbrachiopods from the Middle Ordovician are described and illustrated. This fauna was recovered from the uppermost beds of the San Juan Formation in two sections of the Central Precordillera (Argentina), which are accurately dated to the Lenodus pseudoplanus Zone (middle Darriwilian). The fauna consists of the obolid Luthieria diminuta n. gen. n. sp., and the acrotretids Eoconulus tucunucoensis n. sp., Conotreta andina Lavié, Serra, and Feltes, Scaphelasma zharykensis Popov, and Numericoma rowelli Holmer et al. This low-diversity lingulate association displays close similarities with coeval faunas that inhabited the Laurentia, Baltica, and Kazakhstanian regions, in agreement with evidence from other linguliform and rhynchonelliform brachiopods.

UUID: http//zoobank.org/fe9acbb0-6654-4462-ba4d-ea2386ae79f6

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Journal of Paleontology , Volume 95 , Issue 4 , July 2021 , pp. 720 - 732
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Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Paleontological Society

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