New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil

Two new species of gymnosperm wood from the Triassic–Jurassic of Brazil are here described [Lobatoxylon kaokense Kräusel and Chapmanoxylon jamuriense (Maheswari) Pant & Singh], and a new age and generic a nity are proposed for Cedroxylon canoasense Rau. To the latter, originally considered as...

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Autores principales: Crisafulli, Alexandra María Cristina, Herbst, Rafael, Lindner Dutra, Tânia
Formato: Artículo
Lenguaje:Inglés
Publicado: Sociedad Brasileira de Pleontología 2021
Materias:
Fossil woods
Seed ovule
Gymnosperms
Ginkgophyta
Permian
Triassic jurassic
Lenhos
Óvulo semente
Gimnospermas
Permiano
Triássico jurássico
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/27927
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-27927
record_format dspace
spelling I48-R184-123456789-279272025-03-06T10:59:16Z New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil Crisafulli, Alexandra María Cristina Herbst, Rafael Lindner Dutra, Tânia Fossil woods Seed ovule Gymnosperms Ginkgophyta Permian Triassic jurassic Lenhos Óvulo semente Gimnospermas Ginkgophyta Permiano Triássico jurássico Two new species of gymnosperm wood from the Triassic–Jurassic of Brazil are here described [Lobatoxylon kaokense Kräusel and Chapmanoxylon jamuriense (Maheswari) Pant & Singh], and a new age and generic a nity are proposed for Cedroxylon canoasense Rau. To the latter, originally considered as Triassic, an early Permian age is proposed based on its lithological relationships and the location of its discovery. Additionally, a seed-ovule structure linked to Kaokoxylon zalesskyi (Sahni) Maheswari wood materials, is illustrated and analyzed. All materials were identiied in the sedimentary rocks exposed in the central E-W belt (Central Depression) of the State of Rio Grande do Sul, South Brazil, where is exposed the Gondwana Sequence of Paraná Basin. The new wood taxa here described increase the number of known genera in the Triassic–Jurassic of southern Brazil. Nevertheless, the arboreal vegetation of gymnosperms remains impoverished when compared with that present in the Permian deposits. Survivors from the Permian–Triassic extinction, they show that new and more evolved types were capable to explore and adapt to the new landscapes resulting from the environmental changes that a ected the interior continental areas of Western Gondwana. Duas novas espécies de lenhos gimnospérmicos do Triássico–Jurássico do sul do Brasil são aqui descritas [Lobatoxylon kaokense Kräusel e Chapmanoxylon jamuriense (Maheswari) Pant & Singh], e uma nova ainidade genérica é proposta para Cedroxylon canoasense Rau. Esta última forma, originalmente considerada como Triássica, por suas relações litológicas e local do achado é aqui proposta como referente ao Eopermiano. Além disto, uma semente identiicada junto a fragmentos de lenho de Kaokoxylon zalesskyi (Sahni) Maheswari, é ilustrada e analisada. No conjunto o material lenhoso foi identiicado na faixa central de sentido E-W do Rio Grande do Sul (Depressão Central), onde aloram as litologias da Sequência Gondwana da Bacia do Paraná. As duas novas formas aqui descritas ampliam o número de táxons lenhosos conhecidos para o Triássico–Jurássico no sul do Brasil, apesar de atestar uma vegetação arbórea de gimnospermas mais empobrecida, quando comparada com aquela conhecida para o Permiano. Sobreviventes da Extinção Permo–Triássica demonstram, por outro lado, que novos tipos mais evoluídos foram capazes de explorar e se adaptar às novas paisagens resultantes das mudanças ambientais e climáticas que afetaram as áreas do interior do Gondwana Ocidental. 2021-05-13T17:12:05Z 2021-05-13T17:12:05Z 2018 Artículo Crisafulli, Alexandra María Cristina, Herbst, Rafael y Lindner Dutra, Tania, 2018. New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil. Revista Brasileira de Paleontologia. Río de Janeiro: Sociedad Brasileira de Pleontología, vol. 21, no. 1, p. 47- 62. ISSN 2236-1715. 1519-7530 http://repositorio.unne.edu.ar/handle/123456789/27927 eng https://www.sbpbrasil.org/assets/uploads/files/rbp2018103.pdf openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Sociedad Brasileira de Pleontología Revista Brasileira de Paleontologia, 2018, vol. 21, no. 1, p. 47- 62.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Fossil woods
Seed ovule
Gymnosperms
Ginkgophyta
Permian
Triassic jurassic
Lenhos
Óvulo semente
Gimnospermas
Ginkgophyta
Permiano
Triássico jurássico
spellingShingle Fossil woods
Seed ovule
Gymnosperms
Ginkgophyta
Permian
Triassic jurassic
Lenhos
Óvulo semente
Gimnospermas
Ginkgophyta
Permiano
Triássico jurássico
Crisafulli, Alexandra María Cristina
Herbst, Rafael
Lindner Dutra, Tânia
New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
topic_facet Fossil woods
Seed ovule
Gymnosperms
Ginkgophyta
Permian
Triassic jurassic
Lenhos
Óvulo semente
Gimnospermas
Ginkgophyta
Permiano
Triássico jurássico
description Two new species of gymnosperm wood from the Triassic–Jurassic of Brazil are here described [Lobatoxylon kaokense Kräusel and Chapmanoxylon jamuriense (Maheswari) Pant & Singh], and a new age and generic a nity are proposed for Cedroxylon canoasense Rau. To the latter, originally considered as Triassic, an early Permian age is proposed based on its lithological relationships and the location of its discovery. Additionally, a seed-ovule structure linked to Kaokoxylon zalesskyi (Sahni) Maheswari wood materials, is illustrated and analyzed. All materials were identiied in the sedimentary rocks exposed in the central E-W belt (Central Depression) of the State of Rio Grande do Sul, South Brazil, where is exposed the Gondwana Sequence of Paraná Basin. The new wood taxa here described increase the number of known genera in the Triassic–Jurassic of southern Brazil. Nevertheless, the arboreal vegetation of gymnosperms remains impoverished when compared with that present in the Permian deposits. Survivors from the Permian–Triassic extinction, they show that new and more evolved types were capable to explore and adapt to the new landscapes resulting from the environmental changes that a ected the interior continental areas of Western Gondwana.
format Artículo
author Crisafulli, Alexandra María Cristina
Herbst, Rafael
Lindner Dutra, Tânia
author_facet Crisafulli, Alexandra María Cristina
Herbst, Rafael
Lindner Dutra, Tânia
author_sort Crisafulli, Alexandra María Cristina
title New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
title_short New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
title_full New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
title_fullStr New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
title_full_unstemmed New gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern Brazil
title_sort new gymnosperm wood fossils, a seed ovule structure, and a new generic affinity to cedroxylon canoasense rau from the permian and triassic jurassic of southern brazil
publisher Sociedad Brasileira de Pleontología
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/27927
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