A new Eocene rodent from the lower Arshanto Formation in the Nuhetingboerhe (Camp Margetts) area, Inner Mongolia ; American Museum novitates, no. 3569

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dc.contributor.authorMeng, Jin (Paleontologist)en_US
dc.contributor.authorLi, Chuan-Kuei.en_US
dc.contributor.authorNi, Xijun.en_US
dc.contributor.authorWang, Yuan-qing.en_US
dc.contributor.authorBeard, K. Christopher.en_US
dc.date.accessioned2007-05-24T17:22:58Z
dc.date.available2007-05-24T17:22:58Z
dc.date.issued2007en_US
dc.description18 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 17-18).en_US
dc.description.abstractA new miniscule rodent represented by isolated cheek teeth is reported from the lower part of the late early Eocene Arshanto Formation, Nuhetingboerhe (Camp Margetts) area, Inner Mongolia. A new family, based on the new genus and species, is proposed. The new taxon resembles alagomyids but differs from early rodents in having a partial buccal cingulum, a distinct metaconule that merges posteriorly with the postcingulum, a transversely oriented trigon basin that widely separates the paracone and metacone, a prominent hypoconulid on lower molars, and in lacking the hypocone and protocristid. It differs from alagomyids in having a greater length/width ratio of upper cheek teeth, a neomorphic cusp termed as the preprotoconule, a preprotoconule crista that projects anteriorly, an anteroconid on dp4, an oblique cristid obliqua bearing a distinct mesoconid, and the hypoconid more posteriorly extended (or hypoconulid less posteriorly extended) on m3. The dental morphology of the new taxon is derivable from analagomyid dental pattern and is intermediate between alagomyids and rodents of modern aspect; it casts new light on the evolution of dentition of early rodents.en_US
dc.format.extent2958988 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5860
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates, no. 3569en_US
dc.subject.lccQL1 .A436 no.3569, 2007en_US
dc.subject.lcshArchetypomys erlianensi.en_US
dc.subject.lcshTeeth, Fossil -- China -- Inner Mongolia.en_US
dc.subject.lcshRodents, Fossil -- China -- Inner Mongolia.en_US
dc.subject.lcshMammals, Fossil -- China -- Inner Mongolia.en_US
dc.subject.lcshPaleontology -- Eocene -- China -- Inner Mongolia.en_US
dc.subject.lcshPaleontology -- China -- Inner Mongolia.en_US
dc.titleA new Eocene rodent from the lower Arshanto Formation in the Nuhetingboerhe (Camp Margetts) area, Inner Mongolia ; American Museum novitates, no. 3569en_US
dc.title.alternativeNew Eocene rodent familyen_US
dc.typetexten_US

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