Mammalia - Rodentia - Sciuridae

Alternative combinations: Citellus tephrus, Otospermophilus tephrus, Protospermophilus tephrus, Sciurus tephrus, Spermophilus 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 Citellus (Otospermophilus) according to C. C. Black 1963

See also Barnosky 1986, Bryant 1945, Gazin 1932, Korth 1994, Shotwell 1968 and Wilson and Reeder 1993

Sister taxa: Citellus (Otospermophilus) argonautus, Citellus (Otospermophilus) bensoni, Citellus (Otospermophilus) fricki, Citellus (Otospermophilus) gidleyi, Citellus (Otospermophilus) matthewi, Citellus (Otospermophilus) pattersoni, Citellus (Otospermophilus) shotwelli, Citellus (Otospermophilus) wilsoni, Otospermophilus beecheyi, Otospermophilus variegatus

Type specimens:

• Citellus (Otospermophilus) 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: scansorial granivore-frugivore

Distribution:

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Specimen images are retrieved through the ePANDDA API.