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Hepaticites iporangae Ricardi-Branco, Faria, Jasper, and Guerra-Sommer, 2011 from the early Permian of the Paraná Basin, Brazil, is not a liverwort but a tracheophyte

Published online by Cambridge University Press:  12 August 2016

Dieter Uhl
Affiliation:
Setor de Botânica e Paleobotânica do Museu de Ciências Naturais da UNIVATES, Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil 〈ajasper@univates.br〉, 〈tvalerius@universo.univates.br〉, 〈joselinemanfroi@universo.univates.br〉 Programa de Pós-Graduação em Ambiente e Desenvolvimento (PPGAD), Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil Senckenberg Forschungsinstitut und Naturmuseum, 60325, Frankfurt am Main, Germany. Senckenberg Center for Human Evolution and Palaeoenvironment, Institut für Geowissenschaften, Universität Tübingen, 72076, Tübingen, Germany 〈dieter.uhl@senckenberg.de〉
André Jasper
Affiliation:
Setor de Botânica e Paleobotânica do Museu de Ciências Naturais da UNIVATES, Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil 〈ajasper@univates.br〉, 〈tvalerius@universo.univates.br〉, 〈joselinemanfroi@universo.univates.br〉 Programa de Pós-Graduação em Ambiente e Desenvolvimento (PPGAD), Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil Senckenberg Forschungsinstitut und Naturmuseum, 60325, Frankfurt am Main, Germany. Senckenberg Center for Human Evolution and Palaeoenvironment, Institut für Geowissenschaften, Universität Tübingen, 72076, Tübingen, Germany 〈dieter.uhl@senckenberg.de〉
Talyssa Valerius
Affiliation:
Setor de Botânica e Paleobotânica do Museu de Ciências Naturais da UNIVATES, Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil 〈ajasper@univates.br〉, 〈tvalerius@universo.univates.br〉, 〈joselinemanfroi@universo.univates.br〉
Joseline Manfroi
Affiliation:
Setor de Botânica e Paleobotânica do Museu de Ciências Naturais da UNIVATES, Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil 〈ajasper@univates.br〉, 〈tvalerius@universo.univates.br〉, 〈joselinemanfroi@universo.univates.br〉 Programa de Pós-Graduação em Ambiente e Desenvolvimento (PPGAD), Centro Universitário UNIVATES, 95.900-000, Lajeado, Rio Grande do Sul, Brazil
Margot Guerra-Sommer
Affiliation:
Programa de Pós-Graduação em Geociências (PPGGeo), Universidade Federal do Rio Grande do Sul, UFRGS, 91.509-900, Porto Alegre, Rio Grande do Sul, Brazil 〈margot.sommer@ufrgs.br〉
Fresia Soledad Ricardi-Branco
Affiliation:
Departmento de Geologia e Recursos Naturais, Instituto de Geociências, Universidade Estadual de Campinas, UNICAMP, 13.083-970, Campinas, São Paulo, Brazil 〈fresia@ige.unicamp.br〉

Abstract

From new and more complete material, which includes frond fragments with casts of tracheid remains of the rachis, it can be demonstrated that the putative liverwort Hepaticites iporangae Ricardi-Branco, Faria, Jasper, and Guerra-Sommer, 2011, from the early Permian Rio Bonito Formation (Sakmarian) of the Paraná Basin, Brazil, is not a bryophyte but a tracheophyte. The new material was collected from the same locality and layer as the type material, in the Quitéria outcrop in the municipality of Encruzilhada do Sul, state of Rio Grande do Sul, Brazil. From the morphology of the deeply dissected pinnatifid pinnules with narrow laminar lobes, the taxon is provisionally reassigned to the genus Rhodeopteridium. Thus we propose the new combination ‘Rhodeopteridiumiporangae new combination for this taxon. This new systematic interpretation contributes to our understanding of early liverworts (by removing Hepaticites iporangae as a possible taxon thereof) and clarifies an issue of diversity of the flora of the early Permian Rio Bonito Formation resulting from the original misidentification.

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Copyright
Copyright © 2016, The Paleontological Society 

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