Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil

Detalhes bibliográficos
Autor(a) principal: Távora, Vladimir de Araújo
Data de Publicação: 2017
Outros Autores: Monteiro, Débora Barroso, Reis, Salustriano Bosco
Tipo de documento: Artigo
Idioma: por
Título da fonte: Anuário do Instituto de Geociências (Online)
Texto Completo: https://revistas.ufrj.br/index.php/aigeo/article/view/7850
Resumo: This research deals the data obtained from the analysis of calcareous microfossils in samples collected in Pirabas Formation that occurs at Mina B-17 Cimentos do Brasil S. A., municipality of Capanema and Atalaia beach, Salinópolis municipality, Pará State, and aiming at the systematic and paleobiological characterization. The study reveals 27 fragments of crinoids and 18 fragments of ophiuroids, represented by the family  Gorgonocephalidae and genus Ophiomusium and Ophiactis (?) and among the crinoids, were recognized the order Comatulida. The taxonomic composition, living environment and biostratinomic features these echinoderms and other associated faunal elements studied in the lithofacies at Atalaia beach allowed to considere that the fossiliferous concentration is parauthoctonous. The fragments of the echinoderms collected in samples of B-17 Mine characterize a fossiliferous concentration  allochthonous where the vertebrae were transported to the lagoon by tidal channels during storms that ravaged the sea Pirabas. The echinofaune studied keep affinity with the miocenic associations of the Caribbean Biogeographic Province, and the taxa identified corroborate the faunal exchange between regions Eastern Tropical Pacific (PLT) and Tropical Western Atlantic (AOT).
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spelling Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, BrazilSistemática e Paleobiologia de Microfósseis de Equinodermas da Formação Pirabas (Mioceno Inferior), Estado do Pará, BrasilPirabas Formation; Ophiuroidea; Crinoidea; Lower MioceneFormação Pirabas; Ophiuroidea; Crinoidea; Mioceno inferiorThis research deals the data obtained from the analysis of calcareous microfossils in samples collected in Pirabas Formation that occurs at Mina B-17 Cimentos do Brasil S. A., municipality of Capanema and Atalaia beach, Salinópolis municipality, Pará State, and aiming at the systematic and paleobiological characterization. The study reveals 27 fragments of crinoids and 18 fragments of ophiuroids, represented by the family  Gorgonocephalidae and genus Ophiomusium and Ophiactis (?) and among the crinoids, were recognized the order Comatulida. The taxonomic composition, living environment and biostratinomic features these echinoderms and other associated faunal elements studied in the lithofacies at Atalaia beach allowed to considere that the fossiliferous concentration is parauthoctonous. The fragments of the echinoderms collected in samples of B-17 Mine characterize a fossiliferous concentration  allochthonous where the vertebrae were transported to the lagoon by tidal channels during storms that ravaged the sea Pirabas. The echinofaune studied keep affinity with the miocenic associations of the Caribbean Biogeographic Province, and the taxa identified corroborate the faunal exchange between regions Eastern Tropical Pacific (PLT) and Tropical Western Atlantic (AOT).Este trabalho apresenta os dados obtidos a partir da análise de microfósseis calcários presentes em amostras coletadas na Formação Pirabas, Mina B-17 da Cimentos do Brasil S. A., município de Capanema e praia do Atalaia município de Salinópolis, estado do Pará, visando a caracterização sistemática e paleobiológica de novos elementos de equinodermos da Formação Pirabas, pertencentes aos grupos Crinoidea e Ophiuroidea, ainda não reconhecidos nesta unidade litoestratigráfica. Foram recuperados 27 fragmentos de crinoides e 18 fragmentos de ofiuroides, sendo reconhecidos entre os ofiuroides a família Gorgonocephalidae e os gêneros Ophiomusium e Ophiactis (?) e entre os crinoides a ordem Comatulida. A composição taxonômica, ambiente de vida e feições bioestratinômicas destes equinodermos e dos demais elementos faunísticos associados, define que é parautóctone a concentração fossilífera de ofiuroides e crinoides coletados nas litofacies tipicamente marinhas plataformais aflorantes na praia do Atalaia, e que os elementos recuperados na litofácies da Mina B-17 caracterizam uma concentração fossilífera alóctone, onde as vértebras foram carreadas para a laguna pelos canais de maré durante as tempestades que assolaram o mar de Pirabas. Os ofiuroides e crinoides estudados guardam afinidade com as equinofaunas miocênicas da Província Biogeográfica Caribeana, corroborando o intercâmbio faunístico entre as regiões Pacífico Leste Tropical (PLT) e Atlântico Oeste Tropical (AOT).Universidade Federal do Rio de Janeiro2017-02-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/785010.11137/2015_1_116_127Anuário do Instituto de Geociências; Vol 38, No 1 (2015); 116-127Anuário do Instituto de Geociências; Vol 38, No 1 (2015); 116-1271982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/7850/6331Copyright (c) 2016 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessTávora, Vladimir de AraújoMonteiro, Débora BarrosoReis, Salustriano Bosco2017-02-15T17:59:16Zoai:www.revistas.ufrj.br:article/7850Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2017-02-15T17:59:16Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
Sistemática e Paleobiologia de Microfósseis de Equinodermas da Formação Pirabas (Mioceno Inferior), Estado do Pará, Brasil
title Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
spellingShingle Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
Távora, Vladimir de Araújo
Pirabas Formation; Ophiuroidea; Crinoidea; Lower Miocene
Formação Pirabas; Ophiuroidea; Crinoidea; Mioceno inferior
title_short Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
title_full Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
title_fullStr Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
title_full_unstemmed Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
title_sort Systematic and Paleobiology of the Echinodermata Microfossils of the Pirabas Formation (Lower Miocene), Pará State, Brazil
author Távora, Vladimir de Araújo
author_facet Távora, Vladimir de Araújo
Monteiro, Débora Barroso
Reis, Salustriano Bosco
author_role author
author2 Monteiro, Débora Barroso
Reis, Salustriano Bosco
author2_role author
author
dc.contributor.author.fl_str_mv Távora, Vladimir de Araújo
Monteiro, Débora Barroso
Reis, Salustriano Bosco
dc.subject.por.fl_str_mv Pirabas Formation; Ophiuroidea; Crinoidea; Lower Miocene
Formação Pirabas; Ophiuroidea; Crinoidea; Mioceno inferior
topic Pirabas Formation; Ophiuroidea; Crinoidea; Lower Miocene
Formação Pirabas; Ophiuroidea; Crinoidea; Mioceno inferior
description This research deals the data obtained from the analysis of calcareous microfossils in samples collected in Pirabas Formation that occurs at Mina B-17 Cimentos do Brasil S. A., municipality of Capanema and Atalaia beach, Salinópolis municipality, Pará State, and aiming at the systematic and paleobiological characterization. The study reveals 27 fragments of crinoids and 18 fragments of ophiuroids, represented by the family  Gorgonocephalidae and genus Ophiomusium and Ophiactis (?) and among the crinoids, were recognized the order Comatulida. The taxonomic composition, living environment and biostratinomic features these echinoderms and other associated faunal elements studied in the lithofacies at Atalaia beach allowed to considere that the fossiliferous concentration is parauthoctonous. The fragments of the echinoderms collected in samples of B-17 Mine characterize a fossiliferous concentration  allochthonous where the vertebrae were transported to the lagoon by tidal channels during storms that ravaged the sea Pirabas. The echinofaune studied keep affinity with the miocenic associations of the Caribbean Biogeographic Province, and the taxa identified corroborate the faunal exchange between regions Eastern Tropical Pacific (PLT) and Tropical Western Atlantic (AOT).
publishDate 2017
dc.date.none.fl_str_mv 2017-02-15
dc.type.none.fl_str_mv

dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv https://revistas.ufrj.br/index.php/aigeo/article/view/7850
10.11137/2015_1_116_127
url https://revistas.ufrj.br/index.php/aigeo/article/view/7850
identifier_str_mv 10.11137/2015_1_116_127
dc.language.iso.fl_str_mv por
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dc.relation.none.fl_str_mv https://revistas.ufrj.br/index.php/aigeo/article/view/7850/6331
dc.rights.driver.fl_str_mv Copyright (c) 2016 Anuário do Instituto de Geociências
http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 Anuário do Instituto de Geociências
http://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
dc.source.none.fl_str_mv Anuário do Instituto de Geociências; Vol 38, No 1 (2015); 116-127
Anuário do Instituto de Geociências; Vol 38, No 1 (2015); 116-127
1982-3908
0101-9759
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