Order Rodentia - Family Sciuridae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 754 818 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Spermophilus (Xerospermophilus) tereticaudus subsp. tereticaudus Baird 1858 Spermophilus (Xerospermophilus) tereticaudus subsp. tereticaudus Baird 1858 , Mammalia , in: Repts. U. S. Expl. Surv., Vol. 8, 1: 315 . Type Locality: [Old] "Fort Yuma" [Imperial Co., California , USA ]. Synonyms: Spermophilus (Xerospermophilus) tereticaudus subsp. eremonomus (Elliot 1904) ; Spermophilus (Xerospermophilus) tereticaudus subsp. vociferans (Huey 1926) .