Cranial foramina and relationships of the Eomyoidea (Rodentia, Geomorpha) : skull and upper teeth of Kansasimys

Related Titles

Series: American Museum novitates, no. 2645

By

Wahlert, John H.

Type

Book

Material

Published material

Publication info

New York, N.Y American Museum of Natural History c1978

Notes

Title from caption.

"April 20, 1978."

"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].

Subjects

Eomyoidea , Kansasimys dubius , Mammals, Fossil , Paleontology , Phylogeny , Rodents , Rodents, Fossil , Skull , Teeth, Fossil , Tertiary , West (U.S.)

Call Number

QL1 .A436 no.2645, 1978

Language

English

Identifiers

LCCN: https://lccn.loc.gov/78103991
OCLC: 7552553