Eurydesma-Lyonia fauna (Early Permian) from the Itarare group, Parana Basin (Brazil): A paleobiogeographic W-E trans-Gondwanan marine connection

Author(s)

Cesar Taboada, Arturo ^{[1, 2]} ; Neves, Jacqueline Peixoto ^[3] ; Weinschutz, Luiz Carlos ^[4] ; Alejandra Pagani, Maria ^{[5, 1]} ; Simoes, Marcello Guimaraes ^[3]

Affiliation

^[1] Consejo Nacl Invest Cient & Tecn, CONICET, Buenos Aires, DF - Argentina

^[2] CONICET UNPSJB, CIEMEP, Roca 780, Esquel U9200, Chubut - Argentina

^[3] Univ Estadual Paulista Julio Mesquita Filho UNESP, Inst Biociencias, Dept Zool, Campus Botucatu, Dist Rubino Jr S-N, BR-18618970 Botucatu, SP - Brazil

^[4] Univ Contestado, CENPALEO, Mafra, SC - Brazil

^[5] Museo Paleontol Egidio Feruglio MEF, Ave Fontana 140, Trelew U9100GYO, Chubut - Argentina

• Document type: Journal article
• Source: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY; v. 449, p. 431-454, MAY 1 2016.
• Web of Science Citations: 4

Abstract

Here, the biocorrelation of the marine invertebrate assemblages of the post-glacial succession in the uppermost portion of the Late Paleozoic Itarare Group (Parana Basin, Brazil) is for the first time firmly constrained with other well-dated Gondwanan faunas. The correlation and ages of these marine assemblages are among the main controversial issues related to Brazilian Gondwana geology. In total, 118 brachiopod specimens were analyzed, and at least seven species were identified: Lyonia rochacamposi sp. nov., Langella imbituvensis (Oliveira),? Streptorhynchus sp.,? Cyrtella sp., Tomiopsis sp. cf. T. harringtoni Archbold and Thomas, Quinquenella rionegrensis (Oliveira) and Biconvexiella roxoi Oliveira. The presence of Tomiopsis sp. cf. T. harringtoni and the bivalve Atomodesma (Aphanaia) orbirugata (Harrington) in the Teixeira Soares beds plus Myonia argentinensis (Harrington) and Heteropecten paranaensis Neves et al., both of which recorded in deposits in the Teixeira Soares and Mafra beds (Buda), suggests a biocorrelation with the Eurydesma fauna from the Bonete Formation, Sauce Grande-Colorado Basin, Argentina. Furthermore, the presence of Lyonia Archbold and Praeundulomya cf. subelongata Dickins in the Taciba Formation indicates affinities with deposits in the Lyons Group, Carnarvon Basin, and the Fossil Cliff Member, Perth Basin (Western Australia), suggesting a late Asselian early Sakmarian age. Even more importantly, the collected data suggest the existence of an W-E trans-Gondwanan marine seaway between the Parana (Brazil), Sauce Grande-Colorado (Argentina), Huab (Hardap shale of the Dwyka Group, Aranos area, Namibia, southwest Africa), the Carnavon (Western Australia) basins, and beyond eastward to the Cimmerian region. A V proto-rift system through two major axes of extensional basin development facilitated the W-E marine connection. Main axes formed by a north-northwesterly trending axis paralleling the future South Atlantic and a broadly north-northeasterly trending line of separation related to the future Indian Ocean. This proto-rift system coupled with a sea-level rise of at least 100 m, favored the establishment of a long narrow shallow seaway, allowing the exchange of Eurydesma fauna between eastern and western Gondwana. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/25317-7 - Cisuralian brachiopods of the Itararé group (Mafra and Taciba formations), Paraná Basin, Brazil, and their geologic significance
• Grantee: Jacqueline Peixoto Neves
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/09149-0 - Rhynchonelliform brachiopod faunas of the Itararé group (Carboniferous-lower Permian) of the Paraná Basin, Brazil: biocorrelation and paleogeography
• Grantee: Marcello Guimarães Simões
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• FAPESP's process: 09/17555-0 - Bivalves of the Rio do Sul formation (Lower Permian), state of Paraná: taphonomical, paleoecological and biostratigraphical implications
• Grantee: Jacqueline Peixoto Neves
• Support Opportunities: Scholarships in Brazil - Doctorate