First record of clathropteris brongniart in the late triassic of gondwana

Impressions fronds of Dipteridaceae found in the upper part of the Paso Flores Formation (Norian), Cañadón de Pancho area, Neuquén Province, Argentina are described. In this Formation, the species Dictyophyllum tenuifolium (Stipanicic and Bonetti) Bonetti and Herbst, 1964 and Dictyophyllum (Thauma...

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Autores principales: Gnaedinger, Silvia Cristina, Zavattieri, Ana María
Formato: Reunión
Lenguaje:Inglés
Publicado: Asociación Paleontológica Argentina 2024
Materias:
Clathropteris brongniart
Gondwana
Neuquén (Argentina)
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/54515
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-54515
record_format dspace
spelling I48-R184-123456789-545152025-03-06T11:19:35Z First record of clathropteris brongniart in the late triassic of gondwana Gnaedinger, Silvia Cristina Zavattieri, Ana María Clathropteris brongniart Gondwana Neuquén (Argentina) Impressions fronds of Dipteridaceae found in the upper part of the Paso Flores Formation (Norian), Cañadón de Pancho area, Neuquén Province, Argentina are described. In this Formation, the species Dictyophyllum tenuifolium (Stipanicic and Bonetti) Bonetti and Herbst, 1964 and Dictyophyllum (Thaumatopteris) rothi(Stipanicic and Bonetti) Bonetti and Herbst, 1964 have been previously recorded. The frond fragments found show a coalescent lamina at the base, and primary segments with simple secondary veins, parallel and perpendicular to the primary vein and crossed by tertiary veins, forming a meshwork of regular orthogonal areoles. These characters are diagnostic of Clathropteris Brongniart, 1828 which distinguishes it from other fossil genera of this fern family of Gleicheniales. Specific identification is difficult due to the high morphological variability of fronds present in the different species of the genus. So far, Clathropteris is recorded in the Triassic and Jurassic strata of the Northern Hemisphere and in Jurassic deposits in the Southern Hemisphere. Although the analyzed specimens are incomplete, the importance of this record in the Paso Flores Formation of Argentina lies in the fact that the spatial and temporal distribution of the genus is broadened because it represents the first record of Clathropteris for the Late Triassic of Gondwana. 2024-07-13T14:06:10Z 2024-07-13T14:06:10Z 2020-11 Reunión Gnaedinger, Silvia Cristina y Zavattieri, Ana María, 2020. First record of clathropteris brongniart in the late triassic of gondwana. En: 1° Reunión Virtual de Comunicaciones de la Asociación Paleontológica Argentina. Buenos Aires: Asociación Paleontológica Argentina, p. 39-39. 2469-0228 http://repositorio.unne.edu.ar/handle/123456789/54515 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 39-39 application/pdf Asociación Paleontológica Argentina
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 Clathropteris brongniart
Gondwana
Neuquén (Argentina)
spellingShingle Clathropteris brongniart
Gondwana
Neuquén (Argentina)
Gnaedinger, Silvia Cristina
Zavattieri, Ana María
First record of clathropteris brongniart in the late triassic of gondwana
topic_facet Clathropteris brongniart
Gondwana
Neuquén (Argentina)
description Impressions fronds of Dipteridaceae found in the upper part of the Paso Flores Formation (Norian), Cañadón de Pancho area, Neuquén Province, Argentina are described. In this Formation, the species Dictyophyllum tenuifolium (Stipanicic and Bonetti) Bonetti and Herbst, 1964 and Dictyophyllum (Thaumatopteris) rothi(Stipanicic and Bonetti) Bonetti and Herbst, 1964 have been previously recorded. The frond fragments found show a coalescent lamina at the base, and primary segments with simple secondary veins, parallel and perpendicular to the primary vein and crossed by tertiary veins, forming a meshwork of regular orthogonal areoles. These characters are diagnostic of Clathropteris Brongniart, 1828 which distinguishes it from other fossil genera of this fern family of Gleicheniales. Specific identification is difficult due to the high morphological variability of fronds present in the different species of the genus. So far, Clathropteris is recorded in the Triassic and Jurassic strata of the Northern Hemisphere and in Jurassic deposits in the Southern Hemisphere. Although the analyzed specimens are incomplete, the importance of this record in the Paso Flores Formation of Argentina lies in the fact that the spatial and temporal distribution of the genus is broadened because it represents the first record of Clathropteris for the Late Triassic of Gondwana.
format Reunión
author Gnaedinger, Silvia Cristina
Zavattieri, Ana María
author_facet Gnaedinger, Silvia Cristina
Zavattieri, Ana María
author_sort Gnaedinger, Silvia Cristina
title First record of clathropteris brongniart in the late triassic of gondwana
title_short First record of clathropteris brongniart in the late triassic of gondwana
title_full First record of clathropteris brongniart in the late triassic of gondwana
title_fullStr First record of clathropteris brongniart in the late triassic of gondwana
title_full_unstemmed First record of clathropteris brongniart in the late triassic of gondwana
title_sort first record of clathropteris brongniart in the late triassic of gondwana
publisher Asociación Paleontológica Argentina
publishDate 2024
url http://repositorio.unne.edu.ar/handle/123456789/54515
work_keys_str_mv AT gnaedingersilviacristina firstrecordofclathropterisbrongniartinthelatetriassicofgondwana
AT zavattierianamaria firstrecordofclathropterisbrongniartinthelatetriassicofgondwana
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