Table 2. Mann-Whitney comparisons of microwear features for modern squirrels and one fossil squirrel. A. Comparison of pit counts. Ground squirrels have higher numbers of pits compared to frugivorous tree squirrels, possibly due to more grit in the ground-squirrel diets. B. Comparison of scratch counts. Some species differ significantly from one another, but no consistent differences are seen between ground and tree squirrels.
A.
|
|
C. finlaysonii |
C. prevostii |
Ratufa spp. |
S. annulatus |
S. variegatus |
S. rexroadensis |
C. finlaysonii |
|
NS
|
NS |
Z=-2.52; p=0.012 |
Z=-1.75; p=0.079 |
Z=-2.09; p=0.037 |
C. prevostii |
|
|
NS |
Z=-2.54; |
NS |
Z=-2.27; |
|
Ratufa spp. |
|
|
|
Z=-3.49; |
Z=-2.58; |
Z=-2.65; |
S. annulatus |
|
|
|
|
NS |
NS |
S. varietgatus |
|
|
|
|
|
NS |
|
|
C. finlaysonii |
C. prevostii |
Ratufa spp. |
S. annulatus |
S. variegatus |
S. rexroadensis |
C. finlaysonii |
|
Z=-1.81; p=0.071 |
NS |
NS |
NS |
NS |
|
C. prevostii |
|
|
NS |
NS |
Z=-2.79; p=0.005 |
NS |
|
Ratufa spp. |
|
|
|
NS |
NS |
NS |
|
S. annulatus |
|
|
|
|
Z=-2.34; p=0.019 |
NS |