Propalaeocastor (Rodentia, Mammalia) from the early Oligocene of Burqin Basin, Xinjiang. American Museum novitates ; no. 3461

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dc.contributor.authorWu, Wenyu.en_US
dc.contributor.authorMeng, Jin (Paleontologist)en_US
dc.contributor.authorYe, Jie.
dc.contributor.authorNi, Xijun.
dc.date.accessioned2005-10-06T16:37:51Z
dc.date.available2005-10-06T16:37:51Z
dc.date.issued2004en_US
dc.description16 p. : ill. ; 26 cm.en_US
dc.descriptionElectronic version available in portable document format (PDF).en_US
dc.descriptionIncludes bibliographical references (p. 14-16).en_US
dc.description.abstractA new species of castorids, Propalaeocastor irtyshensis, n.sp., from the Burqin Basin of Xinjiang Uygur Autonomous Region, China, is described. The new species, represented by a right maxilla with well-preserved P4-M3, is the earliest and northernmost occurrence of castorids in China. It is characterized mainly by the cheek tooth crown being higher than that of P. butselensis but lower than that of Steneofiber aff. dehmi (probably a new species of Propalaeocastor), and by lingual confluence of the mesoflexus to the lingual fossette of the premesoflexus. Comparison with known species previously assigned to Steneofiber from Europe and Kazakhstan leads to the conclusion that the early Oligocene forms previously assigned to the genus, such as "S. butselensis" and "S. kazachstanicus", differ significantly from those represented by S. eseri from the late Oligocene and early Miocene of Europe. We consider Propalaeocastor a valid genus, provide an emended diagnosis for it, and discuss its evolutionary trend in relation to Steneofiber. Preliminary analysis of Burqin fauna suggests an age of early early Oligocene. Faunal transformations across the Eocene-Oligocene boundary in the Burqin region are comparable to those of Europe and the Mongolian Plateau and suggest linkage of faunal turnovers and global climate changes.en_US
dc.format.extent359152 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/2771
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3461en_US
dc.subject.lccQL1 .A436 no.3461, 2004en_US
dc.subject.lcshPropalaeocastor irtyshensis.en_US
dc.subject.lcshBeavers, Fossil -- China -- Xinjiang Uygur Zizhiqu.en_US
dc.subject.lcshMammals, Fossil -- China -- Xinjiang Uygur Zizhiqu.en_US
dc.subject.lcshPaleontology -- Oligocene -- China -- Xinjiang Uygur Zizhiqu.en_US
dc.subject.lcshPaleontology -- China -- Xinjiang Uygur Zizhiqu.en_US
dc.titlePropalaeocastor (Rodentia, Mammalia) from the early Oligocene of Burqin Basin, Xinjiang. American Museum novitates ; no. 3461en_US
dc.title.alternativePropalaeocastor from Chinaen_US
dc.typetexten_US

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