New species of osmundaceous fertile leaves from the upper Triassic of Argentina

A new species of <i>Osmundopsis</i> 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. <i>Osmundopsis zunigai</i> sp. Nov. is characteri...

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Detalles Bibliográficos
Autores principales: Coturel, Eliana Paula, Bodnar, Josefina, Morel, Eduardo Manuel, Ganuza, Daniel, Sagasti, Ana Julia, Beltrán, Marisol
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Paleontología
Ciencias Naturales
Carnian
Mendoza province
Osmundaceae
Osmundopsis
Potrerillos formation
Acceso en línea: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
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-96805
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
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 <i>Osmundopsis</i> 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. <i>Osmundopsis zunigai</i> 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 <i>Osmundopsis</i> in the Triassic of Argentina. The mutual occurrence or co-preservation of <i>Osmundopsis zunigai</i> sp. Nov. with sterile fronds of <i>Cladophlebis kurtzi</i> suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the <i>Osmunda</i> 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.
format Articulo
Articulo
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
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bdutipo_str Repositorios
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