New species of osmundaceous fertile leaves from the upper Triassic of Argentina
A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. Nov. is characterized by having fertile pinnae with a sl...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/96805 2023-05-15T13:47:46+02:00 New species of osmundaceous fertile leaves from the upper Triassic of Argentina Coturel, Eliana Paula Bodnar, Josefina Morel, Eduardo Manuel Ganuza, Daniel Sagasti, Ana Julia Beltrán, Marisol 2018-12-24 application/pdf 107-119 http://sedici.unlp.edu.ar/handle/10915/96805 https://ri.conicet.gov.ar/11336/82509 https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xml en eng Acta Palaeobotánica vol. 58, no. 2 http://sedici.unlp.edu.ar/handle/10915/96805 https://ri.conicet.gov.ar/11336/82509 https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xml issn:2082-0259 http://creativecommons.org/licenses/by-nc-nd/3.0/ Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) CC-BY-NC-ND Paleontología Ciencias Naturales Carnian Mendoza province Osmundaceae Osmundopsis Potrerillos formation Articulo 2018 ftunivlaplata 2020-09-20T00:01:05Z A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of Osmundopsis in the Triassic of Argentina. The mutual occurrence or co-preservation of Osmundopsis zunigai sp. Nov. with sterile fronds of Cladophlebis kurtzi suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the Osmunda lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctica Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Argentina Uspallata ENVELOPE(-66.867,-66.867,-68.183,-68.183) |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Paleontología Ciencias Naturales Carnian Mendoza province Osmundaceae Osmundopsis Potrerillos formation |
spellingShingle |
Paleontología Ciencias Naturales Carnian Mendoza province Osmundaceae Osmundopsis Potrerillos formation Coturel, Eliana Paula Bodnar, Josefina Morel, Eduardo Manuel Ganuza, Daniel Sagasti, Ana Julia Beltrán, Marisol New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
topic_facet |
Paleontología Ciencias Naturales Carnian Mendoza province Osmundaceae Osmundopsis Potrerillos formation |
description |
A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of Osmundopsis in the Triassic of Argentina. The mutual occurrence or co-preservation of Osmundopsis zunigai sp. Nov. with sterile fronds of Cladophlebis kurtzi suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the Osmunda lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
author |
Coturel, Eliana Paula Bodnar, Josefina Morel, Eduardo Manuel Ganuza, Daniel Sagasti, Ana Julia Beltrán, Marisol |
author_facet |
Coturel, Eliana Paula Bodnar, Josefina Morel, Eduardo Manuel Ganuza, Daniel Sagasti, Ana Julia Beltrán, Marisol |
author_sort |
Coturel, Eliana Paula |
title |
New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
title_short |
New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
title_full |
New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
title_fullStr |
New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
title_full_unstemmed |
New species of osmundaceous fertile leaves from the upper Triassic of Argentina |
title_sort |
new species of osmundaceous fertile leaves from the upper triassic of argentina |
publishDate |
2018 |
url |
http://sedici.unlp.edu.ar/handle/10915/96805 https://ri.conicet.gov.ar/11336/82509 https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xml |
long_lat |
ENVELOPE(-66.867,-66.867,-68.183,-68.183) |
geographic |
Argentina Uspallata |
geographic_facet |
Argentina Uspallata |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Acta Palaeobotánica vol. 58, no. 2 http://sedici.unlp.edu.ar/handle/10915/96805 https://ri.conicet.gov.ar/11336/82509 https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xml issn:2082-0259 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/ Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766247822963769344 |