Mammalia - Rodentia - Sciuridae

Alternative combinations: Citellus (Otospermophilus) tephrus, Citellus tephrus, Otospermophilus tephrus, Protospermophilus tephrus, Sciurus tephrus

Synonym: Citellus ridgwayi Gazin 1932

Full reference: C. L. Gazin. 1932. A Miocene Mammalian Fauna From South-Eastern Oregon. Carnegie Institution of Washington Publication 418(3):37-86

Belongs to Spermophilus according to J. A. Shotwell 1968

See also Barnosky 1986, Black 1963, Bryant 1945, Gazin 1932, Korth 1994 and Wilson and Reeder 1993

Sister taxa: Spermophilus armatus, Spermophilus cochisei, Spermophilus columbianus, Spermophilus cragini, Spermophilus dotti, Spermophilus finlayensis, Spermophilus howelli, Spermophilus johnstoni, Spermophilus lorisrusselli, Spermophilus mcgheei, Spermophilus meadensis, Spermophilus meltoni, Spermophilus primitivus, Spermophilus rexroadensis, Spermophilus russelli, Spermophilus spilosoma, Spermophilus superciliosus, Spermophilus taylori, Spermophilus tridecemlineatus, Spermophilus tuitus, Spermophilus wellingtonensis, Spermophilus wilsoni

Type specimens:

• Spermophilus tephrus: CIT 332, a partial skull ( skull without the zygomatic arches, the posterior part of the cranium, and the left cheek teeth; incisors broken off at alveoli.). Its type locality is Skull Spring, which is in a Barstovian terrestrial volcaniclastic in the Butte Creek Formation of Oregon.
• Citellus ridgwayi: CIT 334, a partial skull (The facial region of the skull, including most of the right zygomatic arch and all of the teeth except the right P3; the incisors are broken at the alveoli). Its type locality is Skull Spring, which is in a Barstovian terrestrial volcaniclastic in the Butte Creek Formation of Oregon.

Ecology: semifossorial granivore-frugivore

Distribution:

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Specimen images are retrieved through the ePANDDA API.