Wasatchian (early Eocene) mammals and other vertebrates from Baja California, Mexico : the Lomas Las Tetas de Cabra fauna. Bulletin of the AMNH ; no. 208

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dc.contributor.author Novacek, Michael J. en_US
dc.contributor.author Ferrusquia-Villafranca, Ismael.
dc.contributor.author Flynn, John J. (John Joseph), 1955-
dc.contributor.author Wyss, Andre R.
dc.contributor.author Norell, Mark A.
dc.date.accessioned 2005-11-22T22:49:18Z
dc.date.available 2005-11-22T22:49:18Z
dc.date.issued 1991 en_US
dc.identifier.uri http://hdl.handle.net/2246/903
dc.description 88 p. : ill. (1 col.), maps ; 26 cm. en_US
dc.description Includes bibliographical references (p. 64-70). en_US
dc.description.abstract "Fossil mammal and other vertebrate remains from the Lomas Las Tetas de Cabra in Baja California Norte, Mexico, provide an opportunity to examine the utility of continental scale geochronologies based on land mammal faunas. Early reports proposed a late Paleocene to early Eocene age for this fauna. Recent fieldwork and considerations of cumulative fossil discoveries strongly indicate that the Baja fauna represents the Wasatchian Land Mammal Age (early Eocene) and is strikingly similar to faunas of this age from the western interior of the United States. Wasatchian-age taxa represented in the Baja assemblage include Hyracotherium, Hyopsodus, Meniscotherium (also possibly from Clarkforkian assemblages), Diacodexis, and Prolimnocyon. Also present in the fauna are excellent specimens of Wyolestes and Esteslestes, a new genus of didelphid marsupial, as well as a badly distorted skull of a pantodont. An early Eocene age assignment is supported by analysis of the marine section adjacent to the Tetas de Cabra sequence. The marine organisms are consistent with a middle Ypresian (early Eocene) age assignment. Paleomagnetic analyses of both the terrestrial and marine sections also corroborate this age assignment. These new results substantiate the validity of the Wasatchian as a discrete temporal interval that can be applied at a continental scale. The Wasatchian thus fulfills the expectations for a mammal-based chronology. Similarities, rather than differences, between the Baja assemblage and other Wasatchian-age faunas is the dominant pattern. A choice among dispersal theories for the sources of Wasatchian mammals is not clearly indicated by the faunal evidence"--P. 3. en_US
dc.format.extent 22809476 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 ; no. 208 en_US
dc.subject.lcc QH1 .A4 no.208, 1991 en_US
dc.subject.lcsh Mammals, Fossil -- Mexico -- Baja California (Peninsula) en_US
dc.subject.lcsh Vertebrates, Fossil -- Mexico -- Baja California (Peninsula) en_US
dc.subject.lcsh Paleontology -- Eocene -- Mexico -- Baja California (Peninsula) en_US
dc.subject.lcsh Paleontology -- Mexico -- Baja California (Peninsula) en_US
dc.title Wasatchian (early Eocene) mammals and other vertebrates from Baja California, Mexico : the Lomas Las Tetas de Cabra fauna. Bulletin of the AMNH ; no. 208 en_US
dc.title.alternative Lomas Las Tetas de Cabra 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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