Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia

Foliar cuticle of a new species of Ruflorinia, R.. orlandoi Carrizo et Del Fueyo, from the Lower Cretaceous Springhill Formation in Santa Cruz province, Argentina, is herein described with light and electronic (scanning and transmission) microscopy. The fronds of R.. orlandoi nov. sp. are bipinnate...

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Detalles Bibliográficos
Autores principales:	Carrizo, Martín Alejandro, del Fueyo, Georgina Marisa, Medina, Francisco Alberto
Publicado:	2014
Materias:	Foliar cuticle Lower Cretaceous Patagonia Pteridospermophyta Ruflorinia Springhill Formation Cretaceous cuticle foliation morphology paleobotany palynology pteridophyte scanning electron microscopy taxonomy Argentina Santa Cruz [Argentina] Carrizo Caytoniaceae
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166995_v47_n3_p87_Carrizo http://hdl.handle.net/20.500.12110/paper_00166995_v47_n3_p87_Carrizo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00166995_v47_n3_p87_Carrizo
record_format	dspace
spelling	paper:paper_00166995_v47_n3_p87_Carrizo2023-06-08T14:38:44Z Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia Carrizo, Martín Alejandro del Fueyo, Georgina Marisa Medina, Francisco Alberto Foliar cuticle Lower Cretaceous Patagonia Pteridospermophyta Ruflorinia Springhill Formation Cretaceous cuticle foliation morphology paleobotany palynology pteridophyte scanning electron microscopy taxonomy Argentina Patagonia Santa Cruz [Argentina] Carrizo Caytoniaceae Foliar cuticle of a new species of Ruflorinia, R.. orlandoi Carrizo et Del Fueyo, from the Lower Cretaceous Springhill Formation in Santa Cruz province, Argentina, is herein described with light and electronic (scanning and transmission) microscopy. The fronds of R.. orlandoi nov. sp. are bipinnate and imparipinnate with a conspicuous main rachis bearing alternate to sub-opposite pinnae. Cuticular striations and hairs are present in both epidermises whereas stomata are only on the abaxial cuticle. Stomata have several papillate subsidiary cells and the guard cells are sunken. Ultrastructurally the adaxial and abaxial cuticles are composed of three and two cuticular layers, respectively. The cuticular characters here described are interpreted as a response to a possible adaptation to a wet climate as well as to the fluctuating environment produced by the gradual transition from fluvial to an estuarine and marine setting that characterizes the Springhill Formation. The discovery of this new species allows expanding the previous knowledge of the paleofloristic composition of the Springhill Formation with the addition of the first pteridospermous megafossil described for this formation. Moreover, the record of Ruflorinia orlandoi nov. sp. in the Springhill Formation highlights the importance of the Caytoniales during the Cretaceous in Patagonia. © 2014 Elsevier Masson SAS. Fil:Carrizo, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Del Fueyo, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Medina, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166995_v47_n3_p87_Carrizo http://hdl.handle.net/20.500.12110/paper_00166995_v47_n3_p87_Carrizo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Foliar cuticle Lower Cretaceous Patagonia Pteridospermophyta Ruflorinia Springhill Formation Cretaceous cuticle foliation morphology paleobotany palynology pteridophyte scanning electron microscopy taxonomy Argentina Patagonia Santa Cruz [Argentina] Carrizo Caytoniaceae
spellingShingle	Foliar cuticle Lower Cretaceous Patagonia Pteridospermophyta Ruflorinia Springhill Formation Cretaceous cuticle foliation morphology paleobotany palynology pteridophyte scanning electron microscopy taxonomy Argentina Patagonia Santa Cruz [Argentina] Carrizo Caytoniaceae Carrizo, Martín Alejandro del Fueyo, Georgina Marisa Medina, Francisco Alberto Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
topic_facet	Foliar cuticle Lower Cretaceous Patagonia Pteridospermophyta Ruflorinia Springhill Formation Cretaceous cuticle foliation morphology paleobotany palynology pteridophyte scanning electron microscopy taxonomy Argentina Patagonia Santa Cruz [Argentina] Carrizo Caytoniaceae
description	Foliar cuticle of a new species of Ruflorinia, R.. orlandoi Carrizo et Del Fueyo, from the Lower Cretaceous Springhill Formation in Santa Cruz province, Argentina, is herein described with light and electronic (scanning and transmission) microscopy. The fronds of R.. orlandoi nov. sp. are bipinnate and imparipinnate with a conspicuous main rachis bearing alternate to sub-opposite pinnae. Cuticular striations and hairs are present in both epidermises whereas stomata are only on the abaxial cuticle. Stomata have several papillate subsidiary cells and the guard cells are sunken. Ultrastructurally the adaxial and abaxial cuticles are composed of three and two cuticular layers, respectively. The cuticular characters here described are interpreted as a response to a possible adaptation to a wet climate as well as to the fluctuating environment produced by the gradual transition from fluvial to an estuarine and marine setting that characterizes the Springhill Formation. The discovery of this new species allows expanding the previous knowledge of the paleofloristic composition of the Springhill Formation with the addition of the first pteridospermous megafossil described for this formation. Moreover, the record of Ruflorinia orlandoi nov. sp. in the Springhill Formation highlights the importance of the Caytoniales during the Cretaceous in Patagonia. © 2014 Elsevier Masson SAS.
author	Carrizo, Martín Alejandro del Fueyo, Georgina Marisa Medina, Francisco Alberto
author_facet	Carrizo, Martín Alejandro del Fueyo, Georgina Marisa Medina, Francisco Alberto
author_sort	Carrizo, Martín Alejandro
title	Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
title_short	Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
title_full	Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
title_fullStr	Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
title_full_unstemmed	Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia
title_sort	foliar cuticle of ruflorinia orlandoi nov. sp. (pteridospermophyta) from the lower cretaceous of patagonia
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166995_v47_n3_p87_Carrizo http://hdl.handle.net/20.500.12110/paper_00166995_v47_n3_p87_Carrizo
work_keys_str_mv	AT carrizomartinalejandro foliarcuticleofrufloriniaorlandoinovsppteridospermophytafromthelowercretaceousofpatagonia AT delfueyogeorginamarisa foliarcuticleofrufloriniaorlandoinovsppteridospermophytafromthelowercretaceousofpatagonia AT medinafranciscoalberto foliarcuticleofrufloriniaorlandoinovsppteridospermophytafromthelowercretaceousofpatagonia
_version_	1768542581866627072

Foliar cuticle of Ruflorinia orlandoi nov. sp. (Pteridospermophyta) from the Lower Cretaceous of Patagonia

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