Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina
Cuticles of leaves and scale-leaves belonging to the order Bennettitales are discussed using light microscopy (LM) and scanning and transmission electron microscopy (SEM and TEM). The cuticles occur in the Springhill Formation (Lower Cretaceous) of Santa Cruz Province, Argentina. The fossil group is...
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ftconicet:oai:ri.conicet.gov.ar:11336/136898 2023-10-09T21:46:35+02:00 Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina Villar, Liliana Monica application/pdf http://hdl.handle.net/11336/136898 eng eng Academic Press Ltd - Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/doi/10.1006/cres.2001.0266 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0195667101902666?via%3Dihub http://hdl.handle.net/11336/136898 Villar, Liliana Monica; Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina; Academic Press Ltd - Elsevier Science Ltd; Cretaceous Research; 22; 4; 12-2001; 461-479 0195-6671 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ARGENTINA BENNETTITALES CUTICLES LOWER CRETACEOUS SANTA CRUZ PROVINCE SPRINGHILL FORMATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1006/cres.2001.0266 2023-09-24T19:36:25Z Cuticles of leaves and scale-leaves belonging to the order Bennettitales are discussed using light microscopy (LM) and scanning and transmission electron microscopy (SEM and TEM). The cuticles occur in the Springhill Formation (Lower Cretaceous) of Santa Cruz Province, Argentina. The fossil group is represented by seven species of which one is new and three other species have their diagnosis emended by ultrastructural analysis. The species studied are Otozamites patagonicus sp. nov., Otozamites archangelskyi Baldoni and Taylor, 1983, Pterophyllum trichomatosum Archangelsky and Baldoni, 1972, Ptilophyllum valvatum Villar de Seoane, 1995, Ptilophyllum antarcticum (Halle) Archangelsky and Baldoni, 1972, Cycadolepis coriacea Menéndez, 1966 and Cycadolepis involuta Menéndez, 1966. The leaves and scale-leaves show xeromorphic characters such as sculptured surfaces, sunken stomata and a thick external wall in the epidermis. The xeromorphic characters could indicate high temperatures, low humidity and arid soils. These palaeoenvironmental conditions may have been associated with volcanic activity. The presence of carbonized specimens also suggests the development of forest fires produced by dry seasonal conditions or regional volcanic activity. Fil: Villar, Liliana Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Article in Journal/Newspaper Antarc* CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Argentino Argentina Cretaceous Research 22 4 461 479 |
institution |
Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ARGENTINA BENNETTITALES CUTICLES LOWER CRETACEOUS SANTA CRUZ PROVINCE SPRINGHILL FORMATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ARGENTINA BENNETTITALES CUTICLES LOWER CRETACEOUS SANTA CRUZ PROVINCE SPRINGHILL FORMATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Villar, Liliana Monica Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
topic_facet |
ARGENTINA BENNETTITALES CUTICLES LOWER CRETACEOUS SANTA CRUZ PROVINCE SPRINGHILL FORMATION https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Cuticles of leaves and scale-leaves belonging to the order Bennettitales are discussed using light microscopy (LM) and scanning and transmission electron microscopy (SEM and TEM). The cuticles occur in the Springhill Formation (Lower Cretaceous) of Santa Cruz Province, Argentina. The fossil group is represented by seven species of which one is new and three other species have their diagnosis emended by ultrastructural analysis. The species studied are Otozamites patagonicus sp. nov., Otozamites archangelskyi Baldoni and Taylor, 1983, Pterophyllum trichomatosum Archangelsky and Baldoni, 1972, Ptilophyllum valvatum Villar de Seoane, 1995, Ptilophyllum antarcticum (Halle) Archangelsky and Baldoni, 1972, Cycadolepis coriacea Menéndez, 1966 and Cycadolepis involuta Menéndez, 1966. The leaves and scale-leaves show xeromorphic characters such as sculptured surfaces, sunken stomata and a thick external wall in the epidermis. The xeromorphic characters could indicate high temperatures, low humidity and arid soils. These palaeoenvironmental conditions may have been associated with volcanic activity. The presence of carbonized specimens also suggests the development of forest fires produced by dry seasonal conditions or regional volcanic activity. Fil: Villar, Liliana Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina |
format |
Article in Journal/Newspaper |
author |
Villar, Liliana Monica |
author_facet |
Villar, Liliana Monica |
author_sort |
Villar, Liliana Monica |
title |
Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
title_short |
Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
title_full |
Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
title_fullStr |
Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
title_full_unstemmed |
Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina |
title_sort |
cuticular study of bennettitales from the springhill formation, lower cretaceous of patagonia, argentina |
publisher |
Academic Press Ltd - Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/136898 |
geographic |
Patagonia Argentino Argentina |
geographic_facet |
Patagonia Argentino Argentina |
genre |
Antarc* |
genre_facet |
Antarc* |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1006/cres.2001.0266 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0195667101902666?via%3Dihub http://hdl.handle.net/11336/136898 Villar, Liliana Monica; Cuticular study of Bennettitales from the Springhill Formation, Lower Cretaceous of Patagonia, Argentina; Academic Press Ltd - Elsevier Science Ltd; Cretaceous Research; 22; 4; 12-2001; 461-479 0195-6671 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1006/cres.2001.0266 |
container_title |
Cretaceous Research |
container_volume |
22 |
container_issue |
4 |
container_start_page |
461 |
op_container_end_page |
479 |
_version_ |
1779322309110136832 |