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Biostratigraphy and paleoecology of an unusual palynological record from the Aquidauana Formation, Late Pennsylvanian of Paraná Basin.
An Acad Bras Cienc. 2015 Apr-Jun; 87(2):611-22.AA

Abstract

The Aquidauana Formation is a Permo-Carboniferous sedimentary unit, widely stratigraphicaly distributed in the northwestern and northern portions of the Paraná Basin. However, little paleontological data is available from this formation, preventing accurate biostratigraphic and paleoecological interpretations. An abundant, diversified and well preserved assemblage of palynomorphs was recognized from sampling conducted in an outcrop section in Cipolândia District of Aquidauana Municipality, state of Mato Grosso do Sul, Brazil. A total of 35 indigenous palynomorph taxa was recognized, comprising 6 species of spores (related to 5 genera), 28 species of pollen grains (14 genera) and 1 species of chlorophycean algae. Monosaccate pollen grains are exceptionally dominant, representing 90.38% of the association, particularly constituted by species of the genera Cannanoropollis (30.41% of the total assemblage), Potonieisporites (28.14%) and Plicatipollenites (19.52%). This quantitative overrepresentation is not usual from Gondwana deposits, revealing a particular plant dominance of Cordaitales in the terrestrial flora. These results are interpreted as an upland ecology characterized by plants with a moisture-independent reproduction strategy, under a glacial climate influence. Certain species of pollen allow assignment of this assemblage to the Crucisaccites monoletus Zone (Late Pennsylvanian), which had been recognized only in the middle portion of the Itararé Group at the northeastern margin of the basin.

Authors+Show Affiliations

Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.Departamento de Geologia Aplicada, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista, Rio Claro, SP, Brasil.Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.Departamento de Geologia Aplicada, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista, Rio Claro, SP, Brasil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26062116

Citation

Souza, Paulo A., et al. "Biostratigraphy and Paleoecology of an Unusual Palynological Record From the Aquidauana Formation, Late Pennsylvanian of Paraná Basin." Anais Da Academia Brasileira De Ciencias, vol. 87, no. 2, 2015, pp. 611-22.
Souza PA, Perinotto JA, Félix CM, et al. Biostratigraphy and paleoecology of an unusual palynological record from the Aquidauana Formation, Late Pennsylvanian of Paraná Basin. An Acad Bras Cienc. 2015;87(2):611-22.
Souza, P. A., Perinotto, J. A., Félix, C. M., & Araújo, B. C. (2015). Biostratigraphy and paleoecology of an unusual palynological record from the Aquidauana Formation, Late Pennsylvanian of Paraná Basin. Anais Da Academia Brasileira De Ciencias, 87(2), 611-22. https://doi.org/10.1590/0001-3765201520140427
Souza PA, et al. Biostratigraphy and Paleoecology of an Unusual Palynological Record From the Aquidauana Formation, Late Pennsylvanian of Paraná Basin. An Acad Bras Cienc. 2015 Apr-Jun;87(2):611-22. PubMed PMID: 26062116.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biostratigraphy and paleoecology of an unusual palynological record from the Aquidauana Formation, Late Pennsylvanian of Paraná Basin. AU - Souza,Paulo A, AU - Perinotto,José A J, AU - Félix,Cristina M, AU - Araújo,Bruno C, Y1 - 2015/06/09/ PY - 2014/08/21/received PY - 2014/10/24/accepted PY - 2015/6/11/entrez PY - 2015/6/11/pubmed PY - 2016/1/13/medline SP - 611 EP - 22 JF - Anais da Academia Brasileira de Ciencias JO - An. Acad. Bras. Cienc. VL - 87 IS - 2 N2 - The Aquidauana Formation is a Permo-Carboniferous sedimentary unit, widely stratigraphicaly distributed in the northwestern and northern portions of the Paraná Basin. However, little paleontological data is available from this formation, preventing accurate biostratigraphic and paleoecological interpretations. An abundant, diversified and well preserved assemblage of palynomorphs was recognized from sampling conducted in an outcrop section in Cipolândia District of Aquidauana Municipality, state of Mato Grosso do Sul, Brazil. A total of 35 indigenous palynomorph taxa was recognized, comprising 6 species of spores (related to 5 genera), 28 species of pollen grains (14 genera) and 1 species of chlorophycean algae. Monosaccate pollen grains are exceptionally dominant, representing 90.38% of the association, particularly constituted by species of the genera Cannanoropollis (30.41% of the total assemblage), Potonieisporites (28.14%) and Plicatipollenites (19.52%). This quantitative overrepresentation is not usual from Gondwana deposits, revealing a particular plant dominance of Cordaitales in the terrestrial flora. These results are interpreted as an upland ecology characterized by plants with a moisture-independent reproduction strategy, under a glacial climate influence. Certain species of pollen allow assignment of this assemblage to the Crucisaccites monoletus Zone (Late Pennsylvanian), which had been recognized only in the middle portion of the Itararé Group at the northeastern margin of the basin. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/26062116/Biostratigraphy_and_paleoecology_of_an_unusual_palynological_record_from_the_Aquidauana_Formation_Late_Pennsylvanian_of_Paraná_Basin_ L2 - http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015005040427&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -
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