Research Library | Digital Repository

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

Show simple item record

dc.contributor.author Meng, Jin (Paleontologist) en_US
dc.contributor.author Li, Chuan-Kuei. en_US
dc.contributor.author Ni, Xijun. en_US
dc.contributor.author Wang, Yuan-qing. en_US
dc.contributor.author Beard, K. Christopher. en_US
dc.date.accessioned 2007-05-24T17:22:58Z
dc.date.available 2007-05-24T17:22:58Z
dc.date.issued 2007 en_US
dc.identifier.uri http://hdl.handle.net/2246/5860
dc.description 18 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 17-18). en_US
dc.description.abstract A 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.extent 2958988 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates, no. 3569 en_US
dc.subject.lcc QL1 .A436 no.3569, 2007 en_US
dc.subject.lcsh Archetypomys erlianensi. en_US
dc.subject.lcsh Teeth, Fossil -- China -- Inner Mongolia. en_US
dc.subject.lcsh Rodents, Fossil -- China -- Inner Mongolia. en_US
dc.subject.lcsh Mammals, Fossil -- China -- Inner Mongolia. en_US
dc.subject.lcsh Paleontology -- Eocene -- China -- Inner Mongolia. en_US
dc.subject.lcsh Paleontology -- China -- Inner Mongolia. en_US
dc.title A new Eocene rodent from the lower Arshanto Formation in the Nuhetingboerhe (Camp Margetts) area, Inner Mongolia ; American Museum novitates, no. 3569 en_US
dc.title.alternative New Eocene rodent family en_US
dc.type text en_US


Files in this item

This item appears in the following Collection(s)

  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

Show simple item record

Search Entire Repository

Advanced Search

Browse

My Account