The oldest record of Ediacaran macrofossils in Gondwana (similar to 563 Ma, Itajai Basin, Brazil)

Autor(es):Mostrar menos -

Becker-Kerber, Bruno ^{[1, 2]} ; Gomes Paim, Paulo Sergio ^[3] ; Chemale Junior, Farid ^[3] ; Girelli, Tiago Jonatan ^[3] ; Zucatti da Rosa, Ana Lucia ^[4] ; El Albani, Abderrazak ^[2] ; Oses, Gabriel Ladeira ^[1] ; Prado, Gustavo M. E. M. ^[5] ; Figueiredo, Milene ^[6] ; Amarante Simoes, Luiz Sergio ^[7] ; Alves Forancelli Pacheco, Mirian Liza ^{[8, 9]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Programa Posgrad Ecol & Recursos Nat, Washington Luiz 325Km, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Poitiers, CNRS, Unite Mixte Rech UMR, IC2MP 7285, F-86073 Poitiers - France

^[3] Univ Vale Rio dos Sinos, Programa Posgrad Geol, BR-93022750 Sao Leopoldo, RS - Brazil

^[4] Petrobras SA, Santos, SP - Brazil

^[5] Univ Sao Paulo, Inst Geociencias, Rua Lago 562, Cidade Univ, BR-05508080 Sao Paulo, SP - Brazil

^[6] Petrobras Res Ctr CENPES, Rio De Janeiro - Brazil

^[7] Univ Estadual Paulista UNESP, Inst Geociencias & Ciencias Exatas IGCE, Rio Claro, SP - Brazil

^[8] Univ Sao Paulo, Inst Fis, Rua Matao, Travessa R 187, BR-05508090 Sao Paulo - Brazil

^[9] Univ Fed Sao Carlos, Dept Biol, Campus Sorocaba, Rod Joao Leme dos Santos Km 110, BR-18052780 Sorocaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GONDWANA RESEARCH; v. 84, p. 211-228, AUG 2020.
• Citações Web of Science: 0

Resumo

The Avalon biota (Ediacaran Period, 570-559 Ma) marks the first appearance of macroscopic and complex benthic communities in the fossil record. This assemblage is known from a few localities worldwide, mainly in Canada and England. Here, we report for the first time the presence of Ediacaran macrofossils in deposits of similar age from Gondwana (Itajai Basin, southern Brazil). Our new radiometric date (similar to 563 Ma) indicates that the Itajai Basin can be chronocorrelated with the classic Avalonian deposits and thus represents one of the oldest records of the Ediacaran biota in Gondwana. We describe the presence of the Ediacaran genus Palaeopascichnus, as well as discs (Aspidella and Nimbia), and other problematic forms. Contrary to the deep-marine macroorganisms of the Avalon Assemblage, the Itajai fossils are associated with abundant and exceptionally preserved three-dimensional microbial mats and microbially induced sedimentary structures (MISS) in relatively shallow settings (upper slope and distal delta front deposits). In this sense, the Itajai biota could represent early adaptations of benthic macrobiota to the shallower and more photic environments that characterize the later White Sea Assemblage. (C) 2020 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/01827-4 - Paleobiologia da Bacia de Itajaí (Ediacarano? Santa Catarina): implicações evolutivas e paleoecológicas
• Beneficiário: Bruno Becker Kerber
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/21886-0 - O alvorecer de ecossistemas complexos: desvendando e comparando aspectos de preservação excepcional entre as paleobiotas de Itajaí (Ediacarano, Brasil) e Francevillian (Paleoproterozóico, Gabão)
• Beneficiário: Bruno Becker Kerber
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado