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.authorNovacek, Michael J.en_US
dc.contributor.authorFerrusquia-Villafranca, Ismael.
dc.contributor.authorFlynn, John J. (John Joseph), 1955-
dc.contributor.authorWyss, Andre R.
dc.contributor.authorNorell, Mark A.
dc.date.accessioned2005-11-22T22:49:18Z
dc.date.available2005-11-22T22:49:18Z
dc.date.issued1991en_US
dc.description88 p. : ill. (1 col.), maps ; 26 cm.en_US
dc.descriptionIncludes 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.extent22809476 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/903
dc.languageengen_US
dc.language.isoen_US
dc.publisher[New York] : American Museum of Natural Historyen_US
dc.relation.ispartofseriesBulletin of the American Museum of Natural History ; no. 208en_US
dc.subject.lccQH1 .A4 no.208, 1991en_US
dc.subject.lcshMammals, Fossil -- Mexico -- Baja California (Peninsula)en_US
dc.subject.lcshVertebrates, Fossil -- Mexico -- Baja California (Peninsula)en_US
dc.subject.lcshPaleontology -- Eocene -- Mexico -- Baja California (Peninsula)en_US
dc.subject.lcshPaleontology -- Mexico -- Baja California (Peninsula)en_US
dc.titleWasatchian (early Eocene) mammals and other vertebrates from Baja California, Mexico : the Lomas Las Tetas de Cabra fauna. Bulletin of the AMNH ; no. 208en_US
dc.title.alternativeLomas Las Tetas de Cabra faunaen_US
dc.typetexten_US

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