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dc.contributor.author
Carvalho, Monica
dc.contributor.author
Wilf, Peter
dc.contributor.author
Hermsen, Elizabeth
dc.contributor.author
Gandolfo, Maria
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Cuneo, Nestor Ruben
dc.contributor.author
Johnson, Kirk
dc.date.available
2016-04-27T13:52:07Z
dc.date.issued
2013-09
dc.identifier.citation
Carvalho, Monica; Wilf, Peter; Hermsen, Elizabeth; Gandolfo, Maria; Cuneo, Nestor Ruben; et al.; First record of Todea (Osmundaceae) in South America, from the early Eocene paleorainforests of Laguna del Hunco (Patagonia, Argentina); Botanical Society of America; American Journal of Botany; 100; 9; 9-2013; 1831-1848
dc.identifier.issn
0002-9122
dc.identifier.uri
http://hdl.handle.net/11336/5393
dc.description.abstract
Premise of the Study: The early Eocene Laguna del Hunco caldera-lake paleoflora (ca. 52 Ma) from Chubut Province, Argentina, is notably diverse and includes many conifer and angiosperm lineages that are extinct in South America but extant in Australasian rainforests. No ferns have been previously described from Laguna del Hunco. We describe and interpret a new species of fossil Osmundaceae based on fertile and sterile pinnae.
Methods: The fossil specimens were compared with other extant and fossil Osmundaceae based on living and herbarium material and published descriptions. A morphological matrix based on 29 characters was constructed for 17 living species in Osmundaceae, four species assigned to the fossil genus Todites, and the new fossil species. Phylogenetic analyses were conducted under parsimony using morphology and total evidence matrices.
Key Results: Both the new fossil and the Todites species were consistently resolved within the leptopteroid clade of Osmundaceae, and the new species resolved in a clade with the two living Todea species, which are now restricted to Australia, New Guinea, New Zealand, and southern Africa.
Conclusions: Todea amissa sp. nov. is the first record of Todea, living or fossil, in South America and only the second fossil record worldwide. The distribution of extant Todea on Gondwanan continents other than South America is broadly shared with other taxa from Laguna del Hunco, further indicating that a large component of this flora represents a Gondwanic biome that is no longer found on the South American continent.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Botanical Society of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Biogeography
dc.subject
Gondwana
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Laguna del Hunco
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Osmundaceae
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
First record of Todea (Osmundaceae) in South America, from the early Eocene paleorainforests of Laguna del Hunco (Patagonia, Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-06 15:52:43.262787-03
dc.journal.volume
100
dc.journal.number
9
dc.journal.pagination
1831-1848
dc.journal.pais
Estados Unidos
dc.journal.ciudad
St. Louis
dc.description.fil
Fil: Carvalho, Monica. Cornell University; Estados Unidos. State University Of Pennsylvania; Estados Unidos
dc.description.fil
Fil: Wilf, Peter. State University Of Pennsylvania; Estados Unidos
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Fil: Hermsen, Elizabeth. Ohio University; Estados Unidos
dc.description.fil
Fil: Gandolfo, Maria. Cornell University; Estados Unidos
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Fil: Cuneo, Nestor Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
dc.description.fil
Fil: Johnson, Kirk. National Museum of Natural History; Estados Unidos
dc.journal.title
American Journal of Botany
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.amjbot.org/content/100/9/1831.long
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.3732/ajb.1200637
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3732/ajb.1200637
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