Paleolimnological inferences based on Oligocene ostracods (Crustacea: Ostracoda) from Tremme Formation, Southeast Brazil

Autor(es)

Bergue, Cristianini T. ^[1] ; Maranhao, Maria Da Saudade A. S. ^[2] ; Fauth, Gerson ^[1]

Afiliação do(s) autor(es)

^[1] Univ Vale Rio dos Sinos, Inst Tecnol Micropaleontol Itt Fossil, BR-93022000 Sao Leopoldo, RS - Brazil

^[2] Inst Geol Estado Sao Paulo, BR-04330190 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 87, n. 3, p. 1531-1544, SEP 2015.
• Citações Web of Science: 4

Resumo

Non-marine Oligocene ostracods from Tremembe Formation (Taubate Basin, Southeast Brazil) are studied for the first time. The study reveals rich assemblages which are probably composed of many new taxa, two of which are described here. The sixteen ostracod species registered are classified in the genera Cypretta Vavra, Strandesia Stuhlmann, Potamocypris Brady, Heterocypris Claus, Eucypris Vavra, Herpetocypris Brady and Norman, Cytheridella Daday and Limnocythere Brady. Two new species of the latter are herein proposed: L. mandubi sp. nov. and L. katu sp. nov. The succession of ostracod assemblages along the studied core changes conspicuously in composition, abundance and preservation, and are characterized by the following associations: Herpetocypris-Cytheridella (lower), Limnocythere-Cypretta (middle) and Potamocypris-Heterocypris (upper). It is assumed that these associations represent different ecological phases of the paleolake Taubate which is in accordance to previous stratigraphic and paleontological studies in the basin. The results from this pioneering taxonomic and paleoecological study on ostracods from Tremembe Formation reinforce the potential of these fossils for paleolimnological researches in Brazilian Cenozoic deposits. (AU)

• Processo FAPESP: 03/07183-1 - Projeto piloto de recarga artificial de aqüíferos, na bacia hidrográfica do Rio Una, em Taubaté
• Beneficiário: Helio Nobile Diniz
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa em Políticas Públicas