A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis

We here describe Marattiopsis patagonica sp. nov. (Marattiaceae) based on vegetative and fertile foliage impressions from the Lower Jurassic of Chubut Province, Patagonia, Argentina. The new species exhibits a unique combination of vegetative and reproductive features, including a prominent basal au...

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Detalles Bibliográficos
Autores principales:	Cúneo, Nestor Rubén, Scasso, Roberto Adrian
Publicado:	2015
Materias:	Jurassic Marattia Marattiaceae Patagonia Ptisana biological characteristics classification fern fossil record morphology new species nomenclature paleobiogeography paleobotany paleoecology phylogenetics Argentina Chubut Filicophyta
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v13_n8_p677_Escapa http://hdl.handle.net/20.500.12110/paper_14772019_v13_n8_p677_Escapa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_14772019_v13_n8_p677_Escapa
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spelling	paper:paper_14772019_v13_n8_p677_Escapa2023-06-08T16:18:08Z A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis Cúneo, Nestor Rubén Scasso, Roberto Adrian Jurassic Marattia Marattiaceae Patagonia Ptisana biological characteristics classification fern fossil record Jurassic morphology new species nomenclature paleobiogeography paleobotany paleoecology phylogenetics Argentina Chubut Patagonia Filicophyta Marattia Marattiaceae We here describe Marattiopsis patagonica sp. nov. (Marattiaceae) based on vegetative and fertile foliage impressions from the Lower Jurassic of Chubut Province, Patagonia, Argentina. The new species exhibits a unique combination of vegetative and reproductive features, including a prominent basal auricle; finely undulate, denticulate, to serrulate pinnule margins; interstitial fibres (venuli recurrentes) alternating with regular veins; submarginal position and distinctive relative length of synangia (about 12-20% of the pinnule width); and relatively small number of sporangia pairs per synangium (usually 14 or 16). The new species is assigned to the morphogenus Marattiopsis, since it shows no characters that would allow an unambiguous placement in any of the modern genera, Marattia s.s., Ptisana, or Eupodium. The newly established paraphyly of the Marattia s.l. species has a profound impact on the classification of fossil species. In this context, we provide a brief assessment of the significance of the fossil Marattiopsis for phylogenetic and biogeographical interpretations. It appears that essentially modern marattioid ferns, including Marattiopsis, which are commonly considered to be typical elements of tropical areas of the northern hemisphere during the Mesozoic, may have left an important but largely ignored fossil record in subtropical Gondwana. © 2014 The Trustees of the Natural History Museum, London. Fil:Cuneo, N.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scasso, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v13_n8_p677_Escapa http://hdl.handle.net/20.500.12110/paper_14772019_v13_n8_p677_Escapa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Jurassic Marattia Marattiaceae Patagonia Ptisana biological characteristics classification fern fossil record Jurassic morphology new species nomenclature paleobiogeography paleobotany paleoecology phylogenetics Argentina Chubut Patagonia Filicophyta Marattia Marattiaceae
spellingShingle	Jurassic Marattia Marattiaceae Patagonia Ptisana biological characteristics classification fern fossil record Jurassic morphology new species nomenclature paleobiogeography paleobotany paleoecology phylogenetics Argentina Chubut Patagonia Filicophyta Marattia Marattiaceae Cúneo, Nestor Rubén Scasso, Roberto Adrian A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
topic_facet	Jurassic Marattia Marattiaceae Patagonia Ptisana biological characteristics classification fern fossil record Jurassic morphology new species nomenclature paleobiogeography paleobotany paleoecology phylogenetics Argentina Chubut Patagonia Filicophyta Marattia Marattiaceae
description	We here describe Marattiopsis patagonica sp. nov. (Marattiaceae) based on vegetative and fertile foliage impressions from the Lower Jurassic of Chubut Province, Patagonia, Argentina. The new species exhibits a unique combination of vegetative and reproductive features, including a prominent basal auricle; finely undulate, denticulate, to serrulate pinnule margins; interstitial fibres (venuli recurrentes) alternating with regular veins; submarginal position and distinctive relative length of synangia (about 12-20% of the pinnule width); and relatively small number of sporangia pairs per synangium (usually 14 or 16). The new species is assigned to the morphogenus Marattiopsis, since it shows no characters that would allow an unambiguous placement in any of the modern genera, Marattia s.s., Ptisana, or Eupodium. The newly established paraphyly of the Marattia s.l. species has a profound impact on the classification of fossil species. In this context, we provide a brief assessment of the significance of the fossil Marattiopsis for phylogenetic and biogeographical interpretations. It appears that essentially modern marattioid ferns, including Marattiopsis, which are commonly considered to be typical elements of tropical areas of the northern hemisphere during the Mesozoic, may have left an important but largely ignored fossil record in subtropical Gondwana. © 2014 The Trustees of the Natural History Museum, London.
author	Cúneo, Nestor Rubén Scasso, Roberto Adrian
author_facet	Cúneo, Nestor Rubén Scasso, Roberto Adrian
author_sort	Cúneo, Nestor Rubén
title	A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
title_short	A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
title_full	A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
title_fullStr	A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
title_full_unstemmed	A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis
title_sort	new marattiaceous fern from the lower jurassic of patagonia (argentina): the renaissance of marattiopsis
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v13_n8_p677_Escapa http://hdl.handle.net/20.500.12110/paper_14772019_v13_n8_p677_Escapa
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A new marattiaceous fern from the Lower Jurassic of Patagonia (Argentina): The renaissance of Marattiopsis

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