Caspian-like relict molluscan fauna in the South American Permian. Bulletin of the AMNH ; v. 146, article 1

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dc.contributor.authorRunnegar, Bruce.en_US
dc.contributor.authorNewell, Norman Dennis, 1909-en_US
dc.date.accessioned2005-10-06T14:52:53Z
dc.date.available2005-10-06T14:52:53Z
dc.date.issued1971en_US
dc.description66 p. : ill., maps ; 27 cm.en_US
dc.descriptionIncludes bibliographical references (p. 62-66).en_US
dc.description.abstract"Fossiliferous sediments of Permian age occupy an area in the Paraná Basin of Brazil, Uruguay, Paraguay, and Argentina equivalent to about one and one-half times the size of the Gulf of Mexico. The Estrada Nova Formation, ranging from 100 to 1000 meters thick near the middle of the Permian section, contains a widely distributed and diverse fauna of bivalve molluscs made known by J. Camargo Mendes and others. Many of these are silicified and very well preserved. The fauna is remarkable in being wholly confined, so far as is known, to the Paraná Basin. A critical review of the bivalves undertaken in the present paper shows that their family affinities are with marine Gondwana forms found in underlying strata (Tubarão Group) and in other Gondwana continents. The remarkable endemicity of the Estrada Nova fauna and carbon isotope paleosalinities suggest intrabasinal evolutionary radiation under conditions of brackish water and extreme isolation. The history of this relict sea compares favorably with the well-documented, extraordinary history of the Pontian Sea of southeastern Europe of late Cenozoic times and is reminiscent of 'sympatric' evolution of the fishes of east African lakes. The taxonomy of 24 generic and 57 specific names employed for the Permian bivalves is revised and their biologic and ecologic significance is analyzed"--P. 5.en_US
dc.format.extent28453481 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/1092
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York : [American Museum of Natural History]en_US
dc.relation.ispartofseriesBulletin of the American Museum of Natural History ; v. 146, article 1en_US
dc.subject.lccQH1 .A4 vol.146, art.1, 1971en_US
dc.subject.lcshMollusks, Fossil -- South America.en_US
dc.subject.lcshPaleontology -- Permian -- South America.en_US
dc.subject.lcshPaleontology -- South America.en_US
dc.titleCaspian-like relict molluscan fauna in the South American Permian. Bulletin of the AMNH ; v. 146, article 1en_US
dc.title.alternativeMolluscan faunaen_US
dc.typetexten_US

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Bulletin of the American Museum of Natural History