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

Show simple item record Runnegar, Bruce. en_US Newell, Norman Dennis, 1909- en_US 2005-10-06T14:52:53Z 2005-10-06T14:52:53Z 1971 en_US
dc.description 66 p. : ill., maps ; 27 cm. en_US
dc.description Includes 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.extent 28453481 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : [American Museum of Natural History] en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 146, article 1 en_US
dc.subject.lcc QH1 .A4 vol.146, art.1, 1971 en_US
dc.subject.lcsh Mollusks, Fossil -- South America. en_US
dc.subject.lcsh Paleontology -- Permian -- South America. en_US
dc.subject.lcsh Paleontology -- South America. en_US
dc.title Caspian-like relict molluscan fauna in the South American Permian. Bulletin of the AMNH ; v. 146, article 1 en_US
dc.title.alternative Molluscan fauna en_US
dc.type text en_US

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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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