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The first record of Hirnantian Ostracoda in South America: Implications for the biostratigraphy and paleozoogeography of the Paraná basin
(2021-01-01)
Herein is reported the first occurrence of ostracodes from the Iapó Formation, an uppermost Ordovician unit of the Rio Ivaí Group in the Paraná basin, Brazil. Two ostracode species were identified in the Três Barras Farm ...
The Normalograptus persculptus Biozone in the Eusebio Ayala Formation, Paraná Basin, Eastern Paraguay
(John Wiley & Sons Ltd, 2011-12)
In this contribution we report a low diversity graptolite-trilobite fauna from the Eusebio
Ayala Formation (Itacurubí Group) exposed at the intracratonic Paraná Basin of eastern
Paraguay. Analyzed sections are composed ...
An in situ shelly fauna from the lower Paleozoic Zapla diamictite of northwestern Argentina: implications for the age of glacial events across Gondwana
(Pergamon-Elsevier Science Ltd, 2015-06)
A shelly fauna from the upper part of the Zapla glacial diamictite includes thelingulate brachiopod Orbiculoidea radiata Troedsson, the rhynchonelliforms Dalmanella cf. testudinaria (Dalman) and Paromalomena sp., the bivalve ...
Discovery of Silurian sponge spicules from the Argentine Precordillera
(Wiley, 2011-12-06)
An association of silicified spicules of hexactinellid sponges was collected from Silurian sandstones at the top of the La Chilca Formation, cropping out at Cerro del Fuerte, 20 km east of Jáchal, in the San Juan Precordillera ...