Title South American and Antarctic continental cenozoic birds : paleobiogeographic affinities and disparities / Claudia P. Tambussi, Federico J. Degrange

Published Dordrecht ; London : Springer, ©2013

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Description 1 online resource Series Springerbriefs in earth system sciences, Springerbriefs South America and the Southern Hemisphere SpringerBriefs in earth system sciences. Springerbriefs South America and the Southern Hemisphere Contents Paleogeographic Background -- Geological Settings of the Major Fossil Localities in South America and Antarctica -- The Nature of the Fossil Record of Birds -- The Paleogene Birds of South America -- Eocene Birds from Antarctica and Their Relationships with Those of South America -- Neogene Birds of South America -- The Dominance of Zoophagous Birds: Just a Cliché? -- Bio-Connections Between Southern Continents: What is and What is Not Possible to Conclude Summary Modern birds (Neornithes) are represented by two big lineages, the Palaeognathae (Tinamiformes + Ratitae) and the Neognathae [Galloanserae + Neoaves (Metaves + Coronoaves)]. Both clades sum approximately 10,000 species of which 60% are Passeriformes (the most diverse clade of terrestrial vertebrates). A comparison between the past and the present reveals a complex and hallmarked evolutionary and biogeographic history which would have begun over 65 million years ago. For South America (SA) this includes: (1) the presence of taxa with uncertain affinities and the absence of Passeriformes during the Paleogene; (2) a progressive and accelerated increase of the species starting at the Neogene (Miocene); (3) important extinct lineages (e.g. Phorusrhacidae, Teratornithidae) that migrate to North America after the rising of the Panamá isthmus; (4) groups with major diversification in the Neogene that survives nowadays represented by scarce species endemic of SA (Cariamidae) or that inhabits mainly in the southern hemisphere (Anhingidae); (5) very diverse living groups with scarce (e.g., Passeriformes) or none (e.g., Apodiformes) fossil record in SA, which stem-groups are registered in Europe. Apparently, the changes in diversity of the south American Neornithes have been the result of successive radiation, biogeographic connections with North America and in a minor scale, some extinctions. The opening of the Drakés passage and the occurrence of the circumpolar Antarctic flow are not sufficient causes to explain the highly disparity between the weddelians penguins (Sphenisciformes) of Antarctica and those of the patagonian Atlantic Ocean Bibliography Includes bibliographical references Notes Print version record Subject Paleobiogeography -- Cenozoic. Birds -- Evolution -- South America Birds -- Evolution -- Antarctica Birds -- Migration -- South America Birds -- Migration -- Antarctica NATURE -- Animals -- Birds. NATURE -- Birdwatching Guides. SCIENCE -- Life Sciences -- Zoology -- Ornithology. Sciences de la terre. Environnement. Birds -- Evolution Birds -- Migration Cenozoic Geologic Period Paleobiogeography Antarctica South America Form Electronic book Author Degrange, Federico ISBN 9789400754676 9400754671

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