Portland State University. Department of Biology
Richard B. Forbes
Date of Award
Master of Arts (M.A.) in Biology
1 online resource (56 p.)
Cluster analysis of a large body of data on 180 Oregon specimens of Eutamias minimus and E. amoenus suggest that overall length of skull, basal length of skull and length of palate are taxonomically critical. If their sum is less than 71.3 millimeters the animal is E. minimus. If the sum is greater than 72.7 millimeters the animal is E. amoenus. If the sum is between 71.3 and72.7 millimeters, other factors must be considered before the animal can be identified. Of the 180 specimens, there were 60 E. minimus, 114 E. amoenus, 2 hybrids, 2 unidentifiable and 2 mismatched skulls and skins.
Anderson, Sandra Elaine, "Eutamias minimus and E. amoenus : morphological cluster analysis" (1974). Dissertations and Theses. Paper 2265.