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dc.contributor.author
Wilf, Peter  
dc.contributor.author
Donovan, Michael P.  
dc.contributor.author
Cúneo, Néstor Rubén  
dc.contributor.author
Gandolfo, María A.  
dc.date.available
2019-04-30T13:13:07Z  
dc.date.issued
2017-09  
dc.identifier.citation
Wilf, Peter; Donovan, Michael P.; Cúneo, Néstor Rubén; Gandolfo, María A.; The fossil flip-leaves (Retrophyllum, Podocarpaceae) of southern South America; Botanical Society of America; American Journal of Botany; 104; 9; 9-2017; 1344-1369  
dc.identifier.issn
0002-9122  
dc.identifier.uri
http://hdl.handle.net/11336/75287  
dc.description.abstract
PREMISE OF THE STUDY: The flip-leaved podocarp Retrophyllum has a disjunct extant distribution in South American and Australasian tropical rainforests and a Gondwanic fossil record since the Eocene. Evolutionary, biogeographic, and paleoecological insights from previously described fossils are limited because they preserve little foliar variation and no reproductive structures. METHODS: We investigated new Retrophyllum material from the terminal Cretaceous Lefipán, the early Eocene Laguna del Hunco, and the early/middle Eocene Río Pichileufú floras of Patagonian Argentina. We also reviewed type material of historical Eocene fossils from southern Chile. KEY RESULTS: Cretaceous Retrophyllum superstes sp. nov. is described from a leafy twig, while Eocene R. spiralifolium sp. nov. includes several foliage forms and a peduncle with 13 pollen cones. Both species preserve extensive damage from sap-feeding insects associated with foliar transfusion tissue. The Eocene species exhibits a suite of characters linking it to both Neotropical and West Pacific Retrophyllum, along with several novel features. Retrophyllum araucoensis (Berry) comb. nov. stabilizes the nomenclature for the Chilean fossils. CONCLUSIONS: Retrophyllum is considerably older than previously thought and is a survivor of the end-Cretaceous extinction. Much of the characteristic foliar variation and pollen-cone morphology of the genus evolved by the early Eocene. The mixed biogeographic signal of R. spiralifolium supports vicariance and represents a rare Neotropical connection for terminal-Gondwanan Patagonia, which is predominantly linked to extant Australasian floras due to South American extinctions. The leaf morphology of the fossils suggests significant drought vulnerability as in living Retrophyllum, indicating humid paleoenvironments.  
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
Argentina  
dc.subject
Chile  
dc.subject
Conifers  
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Cretaceous  
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Disjunctions  
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Eocene  
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Fossils  
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Podocarpaceae  
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Retrophyllum  
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Transfusion Tissue  
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Meteorología y Ciencias Atmosféricas  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
The fossil flip-leaves (Retrophyllum, Podocarpaceae) of southern South America  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-04-29T14:11:22Z  
dc.journal.volume
104  
dc.journal.number
9  
dc.journal.pagination
1344-1369  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
St. Louis  
dc.description.fil
Fil: Wilf, Peter. State University of Pennsylvania; Estados Unidos  
dc.description.fil
Fil: Donovan, Michael P.. State University of Pennsylvania; Estados Unidos. National Museum of Natural History; Estados Unidos  
dc.description.fil
Fil: Cúneo, Néstor Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina  
dc.description.fil
Fil: Gandolfo, María A.. Cornell University; Estados Unidos  
dc.journal.title
American Journal of Botany  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3732/ajb.1700158  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://bsapubs.onlinelibrary.wiley.com/doi/full/10.3732/ajb.1700158