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TITLE: Rodents from the Hartman Ranch local fauna, California
AUTHOR: Everett Lindsay
JOURNAL: PaleoBios
PUBLISHED: Oct 15, 1968
NOTES: no. 6
ABSTRACT: Fossil rodents, represented by approximately 140 isolated teeth, were collected from the lower part of the Sespe Formation near Sespe Gorge, Ventura County, California. Age of the fauna is Uintan. The Hartman Ranch small mammal fauna includes Pareumys sp., Namatomys fantasma n. sp., Griphomys sp., and Simimys sp. Namatomys fantasma shares morphological features with Simimys, suggesting these forms are phyletically related. N. fantasma has cheek tooth formula (4/4) identifying it as an eomyid while Simimys has cheek tooth formula (3/3) identifying it as a cricetid. Teeth of N. fantasma also resemble those of some sciuravids and zapodids, suggesting N. fantasma is intermediate in a lineage Sciuravidae - Eomyidae - Cricetidae and Zapodidae. Pareumys and Griphomys are presently represented by only a few specimens.
COLLECTION: PaleoBios Archive Public
ID: 228

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    BNHM      University of California, Berkeley