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Cranial foramina and relationships of the Eomyoidea (Rodentia, Geomorpha) : skull and upper teeth of Kansasimys. American Museum novitates ; no. 2645

Show simple item record Wahlert, John H. en_US 2005-10-06T16:44:38Z 2005-10-06T16:44:38Z 1978 en_US
dc.description 16 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 15-16). en_US
dc.description.abstract "Derived characters of the incisive foramen, infraorbital canal, sphenopalatine foramen, transvere canal, sphenopterygoid foramen, carotid canal, and temporal foramina are shared by eomyids and geomyoids (Geomyidae and Heteromyidae). Three of these characters are shared with myoxoids, dipodoids, and muroids. These facts support the hypothesis that eomyids and geomyoids had common ancestry in a stem species from which no other rodent groups are descended. The family Eomyidae is raised to equal rank, Eomyoidea. Likewise, the inclusive infraorder Geomorpha and rodents traditionally considered myomorphs shared unique common ancestry and are placed together in the suborder Myomorpha. Yoderimys and Kansasimys are primitive in the infraorbital canal and lack of interorbital foramen, but Kansasimys shares derived tooth crown morphology with other eomyoids. The skull of Kansasimys is distinguished by large size and by peculiarities of the premaxillary-maxillary suture, temporal-supraorbital crests, and occiput; the teeth resemble those of Adjidaumo"--P. [1]. en_US
dc.format.extent 5846961 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2645 en_US
dc.subject.lcsh Eomyoidea. en_US
dc.subject.lcsh Kansasimys dubius. en_US
dc.subject.lcsh Skull. en_US
dc.subject.lcsh Teeth, Fossil. en_US
dc.subject.lcsh Rodents, Fossil -- West (U.S.) en_US
dc.subject.lcsh Mammals, Fossil -- West (U.S.) en_US
dc.subject.lcsh Paleontology -- Tertiary -- West (U.S.) en_US
dc.subject.lcsh Paleontology -- West (U.S.) en_US
dc.subject.lcsh Rodents -- Phylogeny. en_US
dc.title Cranial foramina and relationships of the Eomyoidea (Rodentia, Geomorpha) : skull and upper teeth of Kansasimys. American Museum novitates ; no. 2645 en_US
dc.type text en_US

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  • 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.

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