Reinterpretation of a Middle Eocene record of Tardigrada (Pilosa, Xenarthra, Mammalia) from La Meseta Formation, Seymour Island, West Antarctica. (American Museum novitates, no. 3689)

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dc.contributor.authorMacPhee, R. D. E.
dc.contributor.authorReguero, Marcelo.
dc.date.accessioned2010-07-01T14:08:03Z
dc.date.available2010-07-01T14:08:03Z
dc.date.issued2010
dc.description21 p. : ill. ; 26 cm. "June 25, 2010." Includes bibliographical references (p. 19-21).en
dc.description.abstractAn isolated and incomplete tooth, discovered in sediments of Middle Eocene La Meseta Fm on Seymour Island (northern Weddell Sea, West Antarctica), has previously been interpreted to be that of a sloth. The specimen as preserved is composed of dentine, as in sloths and tooth-bearing xenarthrans generally. However, characters associated with the dentinal histology of definite sloths are either not represented on the Seymour tooth, or depart considerably from tardigradan and even general xenarthran models according to new observations presented here. On the basis of histological criteria, the La Meseta tooth cannot be shown positively to be tardigradan; it may not even be xenarthran. Further progress with establishing its relationships will depend on the recovery of more (and better) specimens. For the moment, it is best attributed to Mammalia, incertae sedis.en
dc.format.extent14658986 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/6073
dc.language.isoen
dc.publisherAmerican Museum of Natural History.en
dc.relation.ispartofseriesAmerican Museum novitates, no. 3689.en
dc.subjectTeeth, Fossil.en
dc.subjectAntarctica.en
dc.subjectMammals, Fossil.en
dc.subjectLa Meseta Formation (Antarctica)en
dc.subjectEocene.en
dc.titleReinterpretation of a Middle Eocene record of Tardigrada (Pilosa, Xenarthra, Mammalia) from La Meseta Formation, Seymour Island, West Antarctica. (American Museum novitates, no. 3689)en
dc.title.alternativeReinterpretation of La Meseta tardigradan.en

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