A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)

To date only two genera of cycad stems have been described from Cenozoic strata (Bororoa and Menucoa). We describe a new species of Wintucycas, Wintucycas beatrizae sp. nov. (Encephalartoideae), from the basal Palaeogene of Patagonia. The new species is based on anatomically preserved mature cycadal...

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Autores principales:	Martínez, L.C.A., Ottone, E.G., Artabe, A.E.
Formato:	JOUR
Materias:	Anatomy Cenozoic Cycadales Danian South America Systematics anatomy bark gymnosperm new species paleobotany Paleogene range expansion taxonomy Patagonia Cycadopsida
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00346667_v256_n_p1_Martinez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00346667_v256_n_p1_Martinez
record_format	dspace
spelling	todo:paper_00346667_v256_n_p1_Martinez2023-10-03T14:46:02Z A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina) Martínez, L.C.A. Ottone, E.G. Artabe, A.E. Anatomy Cenozoic Cycadales Danian South America Systematics anatomy bark Cenozoic Danian gymnosperm new species paleobotany Paleogene range expansion taxonomy Patagonia Cycadales Cycadopsida To date only two genera of cycad stems have been described from Cenozoic strata (Bororoa and Menucoa). We describe a new species of Wintucycas, Wintucycas beatrizae sp. nov. (Encephalartoideae), from the basal Palaeogene of Patagonia. The new species is based on anatomically preserved mature cycadalean stems which have been recovered from the Pichaihue Limestones (Neuquén Basin, Patagonia, Argentina). The new species is characterized by the presence of a columnar stem with an armor of persistent leaf bases, vascular bundles displaying an omega pattern, the absence of cataphylls, a wide pith with medullary vascular bundles, mucilage canals and idioblasts, a polyxylic vascular cylinder, inverted xylem, and manoxylic wood. The presence of W. beatrizae sp. nov. in the Pichaihue Limestones suggests warm climate conditions during the early Palaeogene in the Neuquén Basin, and also extends the range of this genus of Cycadales (Encephalartoideae) into the Cenozoic. © 2018 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00346667_v256_n_p1_Martinez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Anatomy Cenozoic Cycadales Danian South America Systematics anatomy bark Cenozoic Danian gymnosperm new species paleobotany Paleogene range expansion taxonomy Patagonia Cycadales Cycadopsida
spellingShingle	Anatomy Cenozoic Cycadales Danian South America Systematics anatomy bark Cenozoic Danian gymnosperm new species paleobotany Paleogene range expansion taxonomy Patagonia Cycadales Cycadopsida Martínez, L.C.A. Ottone, E.G. Artabe, A.E. A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
topic_facet	Anatomy Cenozoic Cycadales Danian South America Systematics anatomy bark Cenozoic Danian gymnosperm new species paleobotany Paleogene range expansion taxonomy Patagonia Cycadales Cycadopsida
description	To date only two genera of cycad stems have been described from Cenozoic strata (Bororoa and Menucoa). We describe a new species of Wintucycas, Wintucycas beatrizae sp. nov. (Encephalartoideae), from the basal Palaeogene of Patagonia. The new species is based on anatomically preserved mature cycadalean stems which have been recovered from the Pichaihue Limestones (Neuquén Basin, Patagonia, Argentina). The new species is characterized by the presence of a columnar stem with an armor of persistent leaf bases, vascular bundles displaying an omega pattern, the absence of cataphylls, a wide pith with medullary vascular bundles, mucilage canals and idioblasts, a polyxylic vascular cylinder, inverted xylem, and manoxylic wood. The presence of W. beatrizae sp. nov. in the Pichaihue Limestones suggests warm climate conditions during the early Palaeogene in the Neuquén Basin, and also extends the range of this genus of Cycadales (Encephalartoideae) into the Cenozoic. © 2018 Elsevier B.V.
format	JOUR
author	Martínez, L.C.A. Ottone, E.G. Artabe, A.E.
author_facet	Martínez, L.C.A. Ottone, E.G. Artabe, A.E.
author_sort	Martínez, L.C.A.
title	A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
title_short	A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
title_full	A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
title_fullStr	A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
title_full_unstemmed	A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)
title_sort	new cycad trunk from the palaeocene in the neuquén basin, patagonia (argentina)
url	http://hdl.handle.net/20.500.12110/paper_00346667_v256_n_p1_Martinez
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A new cycad trunk from the Palaeocene in the Neuquén Basin, Patagonia (Argentina)

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