Spermophilus tephrus (extinct)
Variant names:
 Citellus ridgwayi
 Citellus tephrus
 Otospermophilus tephrus
 Protospermophilus tephrus
 Sciurus tephrus

Latitudinal range: 43.4° to 43.6°
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Found in 3 samples

United States: Red Basin (UOloc 2495) (Middle Miocene), Quartz Basin (UOloc 2465) (Middle Miocene), Skull Spring (Middle Miocene)

See also Spermophilus, Spermophilus bensoni, Spermophilus dauricus, Spermophilus erythrogenys, Spermophilus jerae, Spermophilus major, Spermophilus pygmaeus, Spermophilus sp., Spermophilus superciliosus, Spermophilus wellingtonensis, Spermophilus wilsoni