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Cambrian trilobites from the Glossopleura walcotti Zone (Miaolingian Series, Wuliuan Stage) of Mendoza, western Argentina

Published online by Cambridge University Press:  21 December 2021

M. Franco Tortello Open the ORCID record for M. Franco Tortello [Opens in a new window]
M. Franco Tortello*
Affiliation:
Consejo Nacional de Investigaciones Científicas y Técnicas, División Paleozoología Invertebrados, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque s/n°, 1900 La Plata, Argentina
*
*Corresponding author.
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Abstract

The Museo de La Plata houses numerous Miaolingian and Furongian fossils from the southern Precordillera of Mendoza, western Argentina, collected by Ángel V. Borrello during the 1960s. Early Miaolingian (Wuliuan) trilobites from these collections are described herein. The specimens studied come from allochthonous limestone blocks (San Isidro Olistoliths) of key fossiliferous localities of the San Isidro area (Cerro Martillo, Quebrada Oblicua, Quebrada Empozada, Quebrada San Isidro). Taxa comprise Athabaskia anax (Walcott), Glossopleura leona Lochman, Kootenia aff. K. incerta (Rusconi), Kootenia crassa Fritz, Oryctocephalites reynoldsi (Reed), Zacanthoides sp., Spencia? sp., Amecephalus normale? (Resser), Amecephalus laticaudum? (Resser), and Amecephalus sp. This assemblage is representative of the North American Glossopleura walcotti Zone, and closely allied to faunas from the Great Basin (Spence Shale), Sonora, and to a lesser extent from northwestern Idaho.

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Journal of Paleontology , Volume 96 , Issue 3 , May 2022 , pp. 611 - 630
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Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Paleontological Society

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