Spermophilus tephrus (extinct rodent)
Variant names: Citellus ridgwayi, Citellus tephrus, Otospermophilus tephrus, Protospermophilus tephrus, Sciurus tephrus
Abundance: 0.64 to 14.84% (median 2.40%)
Latitudinal range: 43.4° to 43.6°Habitats: (3) only
Found in 3 samples
United States: Red Basin (UOloc 2495) (Middle Miocene), Quartz Basin (UOloc 2465) (Middle Miocene), Skull Spring (Middle Miocene)
Size measurements:
| P4 length | 1.59 mm | N = 1 | Shotwell 1968 |
| P4 length | 1.58 mm | N = 1 | Shotwell 1968 |
| P4 width | 1.80 mm | N = 1 | Shotwell 1968 |
| P4 width | 1.71 mm | N = 1 | Shotwell 1968 |
| p4 length | 1.55 mm | N = 1 | Shotwell 1968 |
| p4 width | 1.40 mm | N = 1 | Shotwell 1968 |
See also Spermophilus, Spermophilus bensoni, Spermophilus dauricus, Spermophilus erythrogenys, Spermophilus jerae, Spermophilus major, Spermophilus pygmaeus, Spermophilus sp., Spermophilus superciliosus, Spermophilus wellingtonensis, Spermophilus wilsoni