Scaphiopus bombifrons Cope, 1863, Proc. Acad. Nat. Sci. Philadelphia, 15: 53. Syntypes: USNM 3704 (Fort Union), 3520 (Platte River), and 3703 (Llano Estacado). Type locality: "Fort Union, on Missouri River, lat. 48° N"; "On Platte River, 200 miles west of Fort Kearney"; "Llano Estacado Texas". Restricted to "Fort Union", North Dakota, USA, by Schmidt, 1953, Check List N. Am. Amph. Rept., Ed. 6: 59.
Spea bombifrons — Cope, 1866, J. Acad. Nat. Sci. Philadelphia, Ser. 2, 6: 81.
Scaphiopus bombifrons — Boulenger, 1882, Cat. Batr. Sal. Coll. Brit. Mus., Ed. 2: 435.
Scaphiopus hammondii bombifrons — Cope, 1889, Bull. U.S. Natl. Mus., 34: 306.
Scaphiopus (Spea) bombifrons — Tanner, 1939, Great Basin Nat., 1: 11. Dubois, 1987 "1986", Alytes, 5: 130.
Spea bombifrons — Firschein, 1950, Herpetologica, 6: 75-77. Tanner, 1989, Great Basin Nat., 49: 56; Wiens and Titus, 1991, Herpetologica, 47: 21-28.
Cope's Spea (Yarrow, 1882, Bull. U.S. Natl. Mus., 24: 24).
Spadefoot of the Western Plains (Dickerson, 1906, The Frog Book: 61).
Central Plains Spadefoot Toad (Smith, 1934, Am. Midl. Nat., 15: 427; Tanner, 1939, Great Basin Nat., 1: 12).
Central Plains Spadefoot (Stebbins, 1951, Amph. W. North Am.: 202; Schmidt, 1953, Check List N. Am. Amph. Rept., Ed. 6: 59).
Plains Spadefoot (Strecker, 1915, Baylor Bull., 18: 54; Conant, Cagle, Goin, Lowe, Neill, Netting, Schmidt, Shaw, Stebbins, and Bogert, 1956, Copeia, 1956: 177; Conant, 1975, Field Guide Rept. Amph. E. Cent. N. Am., Ed. 2: 301; Collins, Huheey, Knight, and Smith, 1978, Herpetol. Circ., 7: 13; Liner, 1994, Herpetol. Circ., 23: 28; Collins, 1997, Herpetol. Circ., 25: 14; Crother, Boundy, Campbell, de Queiroz, Frost, Highton, Iverson, Meylan, Reeder, Seidel, Sites, Taggart, Tilley, and Wake, 2001 "2000", Herpetol. Circ., 29: 16; Stebbins, 2003, Field Guide W. Rept. Amph., Ed. 3: 205; Frost, McDiarmid, and Mendelson, 2008, in Crother (ed.), Herpetol. Circ., 37: 12; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 23; Collins and Taggart, 2009, Standard Common Curr. Sci. Names N. Am. Amph. Turtles Rept. Crocodil., ed. 6: 9; Frost, McDiarmid, Mendelson, and Green, 2012, in Crother (ed.), Herpetol. Circ., 39: 22).
Plains Spadefoot Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 96).
Southern Alberta and southwestern Saskatchewan (Canada) southward through Montana, North Dakota, and Nebraska and eastern Colorado to southeastern Utah, eastern Arizona central Missouri, Oklahoma, and western Texas (USA) to Chihuahua, and Tamaulipas (Mexico).
Stebbins, 2003, Field Guide W. Rept. Amph., Ed. 3: 205-206, provided a brief account, figure, and map.
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