LITERATURE CITED
- Amadon , D. 1949 . The seventy-five per cent rule for subspecies. . Condor , 51 : 250 – 258 .
- Coombs , M. C. 1983 . Large mammalian clawed herbivores: a comparative study. . Transactions of the American Philosophical Society , 73 ( 7 ) : 1 – 96 .
- Matthew , W. D. 1937 . Paleocene faunas of the San Juan Basin, New Mexico. . Transactions of the American Philosophical Society , 30 : 1 – 510 .
- Patterson , B. 1949 . “ Rates of evolution in taeniodonts ” . In Genetics Paleontology and Evolution Edited by: Jepsen , G. L. , Simpson , G. G. and Mayr , E. 243 – 278 . Princeton : Princeton University Press .
- Simpson , G. G. 1961 . Principles of Animal Taxonomy 247 New York : Columbia University Press .
- Wortman , J. L. 1897 . The Ganodonta and their relationship to the Edentata. . Bulletin of the American Museum of Natural History , 9 : 59 – 110 .