University of Kansas Publications
Museum of Natural History
Volume 14, No. 17, pp. 483-491, 2 figs.
March 2, 1964
BY
WILLIAM A. CLEMENS, JR.
University of Kansas
Lawrence
1964
University of Kansas Publications, Museum of Natural History
Editors: E. Raymond Hall, Chairman, Henry S. Fitch,
Theodore H. Eaton, Jr.
Volume 14, No. 17, pp. 483-491, 2 figs.
Published March 2, 1964
University of Kansas
Lawrence, Kansas
PRINTED BY
HARRY (BUD) TIMBERLAKE, STATE PRINTER
TOPEKA, KANSAS
1964
29-8587
BY
WILLIAM A. CLEMENS, JR.
The family Apatemyidae has a long geochronological range inNorth America, beginning in the Torrejonian land-mammal age, butis represented by a relatively small number of fossils found at a fewlocalities. Two fossils of Orellan age, found in northeastern Coloradoand described here, demonstrate that the geochronologicalrange of the Apatemyidae extends into the Middle Oligocene. Isolatedteeth of Sinclairella dakotensis Jepsen, part of a sample of aChadronian local fauna collected by field parties from the WebbSchool of California, are also described.
I thank Mr. Raymond M. Alf, Webb School of California, Claremont,California, and Dr. Peter Robinson, University of Colorado Museum, Boulder,Colorado, for permitting me to describe the fossils they discovered. Also Dr.Robinson made available the draft of a short paper he had prepared on thetooth found in Weld County, Colorado; his work was facilitated by a grantfrom the University of Colorado Council on Research and Creative Work. Ialso gratefully acknowledge receipt of critical data and valuable commentsfrom Drs. Edwin C. Galbreath, Glenn L. Jepsen, and Malcolm C. McKennawho is currently revising the Paleocene apatemyids and studying the phylogeneticrelationships of the family. The prefixes of catalogue numbers usedin the text identify fossils in the collections of the following institutions: KU,Museum of Natural History, The University of Kansas, Lawrence; Princeton,Princeton Museum, Princeton, New Jersey; RAM-UCR, Raymond Alf Museum,Webb School of California, Claremont, California (the permanent repositoryfor these specimens will be the University of California, Riverside); and UCM,University of Colorado Museum, Boulder, Colorado. The system of notationsfor teeth prescribed for use here is as follows: teeth in the upper half of thedentition are designated by a capital letter and a number; thus M2 is the notationfor the upper second molar; teeth in the lower half of the dentition aredesignated by a lower-case letter and a number; thus p2 is the notation for thelower second premolar.
The type of the species, Princet