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dc.contributor.author
Hermsen, Elizabeth
dc.contributor.author
Gandolfo, Maria A.
dc.contributor.author
Cuneo, Nestor Ruben
dc.date.available
2015-08-18T20:36:16Z
dc.date.issued
2013-08
dc.identifier.citation
Hermsen, Elizabeth; Gandolfo, Maria A.; Cuneo, Nestor Ruben; New Marsileaceous Fossils from the Late Cretaceous of South America and a Reevaluation of Marsileaceaephyllum.; Springer Wien; Plant Systematics And Evolution; 8-2013; 1-18
dc.identifier.issn
0378-2697
dc.identifier.issn
http://link.springer.com/article/10.1007%2Fs00606-013-0886-7#page-1
dc.identifier.uri
http://hdl.handle.net/11336/1718
dc.description.abstract
Abstract Herein we report new macrofossils and asso- ciated microfossils representing the aquatic fern family Marsileaceae from the Campanian to Maastrichtian Cañadón del Irupé locality, La Colonia Formation, Chubut Province, Argentina. The macrofossils include compound leaves, detached leaflets, and sporocarps. The venation of the leaflets is consistent with the diagnosis of Marsilea- ceaephyllum, which we argue is poorly defined. Conse- quently, the circumscription and diagnosis of Marsileaceaephyllum are emended in order to limit the taxon to include only leaves or rhizomes bearing leaves with four leaflets that most resemble those of Marsilea among extant genera of Marsileaceae. The Can ̃ ado ́ n del Irupe ́ leaves and leaflets are assigned to the new genus Mirasolita, erected to encompass compound leaves bearing two petiolulate leaflets, each leaflet having a reniform lamina and reticulate venation. The architecture of Mir- asolita leaves and leaflets is distinct from that of leaves of any of the living marsileaceous genera. The stalked sporocarps are assigned to the new genus Lugiomarsiglia. They are attributed to Marsileaceae because each has a sclerenchymatous wall surrounding circular bodies inter- preted as sporangia. Associated megaspores are assigned to Molaspora lobata, a geographically widespread, primarily Late Cretaceous dispersed spore taxon. The co-occurrence of Molaspora lobata with an extinct marsileaceous leaf form fits a pattern wherein Cretaceous Regnellidium-like megaspores are associated with or found in situ within marsileaceous macrofossils that display a variety of morphologies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer Wien
dc.relation
© Springer-Verlag Wien 2013
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Patagonia
dc.subject
Cretaceous
dc.subject
Marsiliaceae
dc.subject
La Colonia
dc.subject.classification
Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
New Marsileaceous Fossils from the Late Cretaceous of South America and a Reevaluation of Marsileaceaephyllum.
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.pagination
1-18
dc.journal.pais
Austria
dc.journal.ciudad
Viena
dc.description.fil
Fil: Hermsen, Elizabeth. Ohio State University; Estados Unidos de América;
dc.description.fil
Fil: Gandolfo, Maria A.. Cornell University; Estados Unidos de América;
dc.description.fil
Fil: Cuneo, Nestor Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina; Museo Paleontologico Egidio Feruglio; Argentina;
dc.journal.title
Plant Systematics And Evolution
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00606-013-0886-7


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