Morphology of the auditory region in Paramys copei and other Eocene rodents from North America. American Museum novitates ; no. 3307

Simple item page
dc.contributor.authorWahlert, John H.en_US
dc.date.accessioned2005-10-06T16:11:14Z
dc.date.available2005-10-06T16:11:14Z
dc.date.issued2000en_US
dc.description16 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 14-16).en_US
dc.description.abstractThe morphology of the external surface of the petrosal and its junction with the basioccipital in Paramys copei is described. Comparison with an outgroup of the Cretaceous Vincelestes and Recent Didelphis and Solenodon reveals that the auditory region retains many primitive features. The Eocene paramyines from North America show only slight differences. Sciuravus is set apart by the lack of a ventral petrosal sinus canal between the petrosal and basioccipital and by the facial nerve and stapedial artery sharing a common foramen in the petrosal. European theridomyids, too, are not as primitive as Paramys but share with it and Sciuravus a ridge on the promontorium that separates the transpromontorial continuation of the internal carotid artery from the origin of the tensor tympani muscle. Twelve characters of the auditory region are analyzed and summarized in a data matrix for use in future studies. Relative primitiveness of the auditory region in all of these Eocene rodents suggests that derived characters in later rodent taxa may represent intraordinal relationships but only homoplasy with nonrodents.en_US
dc.format.extent166896 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/2009
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3307en_US
dc.subject.lccQL1 .A436 no.3307 2000en_US
dc.subject.lcshParamys copei.en_US
dc.subject.lcshEar -- Anatomy.en_US
dc.subject.lcshSkull.en_US
dc.subject.lcshAuditory pathways.en_US
dc.subject.lcshRodents, Fossil -- North America.en_US
dc.subject.lcshMammals, Fossil -- North America.en_US
dc.subject.lcshPaleontology -- Eocene -- North America.en_US
dc.subject.lcshPaleontology -- North America.en_US
dc.titleMorphology of the auditory region in Paramys copei and other Eocene rodents from North America. American Museum novitates ; no. 3307en_US
dc.title.alternativeAuditory region in Paramys copeien_US
dc.typetexten_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
/v2/dspace/ingest/pdfSource/nov/N3307.pdf
Size:
162.98 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

American Museum Novitates