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dc.contributor.author
Clarke, Julia A.  
dc.contributor.author
Sepka, Daniel K.  
dc.contributor.author
Stucchi, Marcelo  
dc.contributor.author
Urbina, Mario  
dc.contributor.author
Giannini, Norberto Pedro  
dc.contributor.author
Bertelli, Sara Beatriz  
dc.contributor.author
Narváez, Yanina  
dc.contributor.author
Boyd, Clint A.  
dc.date.available
2019-09-09T19:44:57Z  
dc.date.issued
2007-12  
dc.identifier.citation
Clarke, Julia A.; Sepka, Daniel K.; Stucchi, Marcelo; Urbina, Mario; Giannini, Norberto Pedro; et al.; Paleogene equatorial penguins challenge the proposed relationship between biogeography, diversity, and Cenozoic climate change; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 104; 28; 12-2007; 11545-11550  
dc.identifier.issn
0027-8424  
dc.identifier.uri
http://hdl.handle.net/11336/83181  
dc.description.abstract
New penguin fossils from the Eocene of Peru force a reevaluation of previous hypotheses regarding the causal role of climate change in penguin evolution. Repeatedly it has been proposed that penguins originated in high southern latitudes and arrived at equatorial regions relatively recently (e.g., 4–8 million years ago), well after the onset of latest Eocene/Oligocene global cooling and increases in polar ice volume. By contrast,newdiscoveries from the middle and late Eocene of Peru reveal that penguins invaded low latitudes >30 million years earlier than prior data suggested, during one of the warmest intervals of the Cenozoic. A diverse fauna includes two new species, here reported from two of the best exemplars of Paleogene penguins yet recovered. The most comprehensive phylogenetic analysis of Sphenisciformes to date, combining morphological and molecular data, places the new species outside the extant penguin radiation (crown clade: Spheniscidae) and supports two separate dispersals to equatorial (paleolatitude 14°S) regions during greenhouse earth conditions. One new species, Perudyptes devriesi, is among the deepest divergences within Sphenisciformes. The second, Icadyptes salasi, is the most complete giant (>1.5 m standing height) penguin yet described. Both species provide critical information on early penguin cranial osteology, trends in penguin body size, and the evolution of the penguin flipper.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
National Academy of Sciences  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Sphenisciformes  
dc.subject
Paleontology  
dc.subject
Climate Change  
dc.subject.classification
Zoología, Ornitología, Entomología, Etología  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Paleogene equatorial penguins challenge the proposed relationship between biogeography, diversity, and Cenozoic climate change  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-08-29T15:42:36Z  
dc.journal.volume
104  
dc.journal.number
28  
dc.journal.pagination
11545-11550  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
New York  
dc.description.fil
Fil: Clarke, Julia A.. North Carolina State University; Estados Unidos  
dc.description.fil
Fil: Sepka, Daniel K.. American Museum of Natural History; Estados Unidos  
dc.description.fil
Fil: Stucchi, Marcelo. Universidad Nacional Mayor de San Marcos; Perú  
dc.description.fil
Fil: Urbina, Mario. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Programa de Investigación de Biodiversidad Argentina; Argentina  
dc.description.fil
Fil: Giannini, Norberto Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina  
dc.description.fil
Fil: Bertelli, Sara Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina  
dc.description.fil
Fil: Narváez, Yanina. Natural History Museum of Los Angeles County; Estados Unidos  
dc.description.fil
Fil: Boyd, Clint A.. North Carolina State University; Estados Unidos  
dc.journal.title
Proceedings of the National Academy of Sciences of The United States of America  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.pnas.org/content/104/28/11545  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1073/pnas.0611099104