Bufo spinulosus arequipensis Vellard, 1959, Mem. Mus. Hist. Nat. Javier Prado, 8: 17. Syntypes: MUSM 812 (2 specimens); MUSM 3896 (renumbered) designated lectotype by Morales, Carrillo, and Ortega, 1990, Publ. Mus. Hist. Nat. Univ. Nac. Mayor San Marcos, 33: 2. Type locality: "Arequipa . . . . Rio Chili", Peru. Given as "Río Chili, (approx, 16° 23′ S, 71° 46′ W, Provincia de Arequipa), Arequipa (Perú, 2400 m)" by Morales, Carrillo, and Ortega, 1990, Publ. Mus. Hist. Nat. Univ. Nac. Mayor San Marcos, 33: 2.
Bufo arequipensis — Cei, 1972, Acta Zool. Lilloana, 29: 233-246.
Chaunus arequipensis — Frost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297: 364. Savage and Bolaños, 2009, Zootaxa, 2005: 4. By implication.
Rhinella arequipensis — Chaparro, Pramuk, and Gluesenkamp, 2007, Herpetologica, 63: 211. by implication; Pramuk, Robertson, Sites, and Noonan, 2008, Global Ecol. Biogeograph., 17: 76.
Rio Chili Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 40).
Arequipa region and upper parts of western valleys, between Tacna and Camaná, southern Pacific Peru.
Considered a distinct species from Bufo spinulosus by Cei, 1972, Acta Zool. Lilloana, 29: 233-246, and Cei, 1980, Monit. Zool. Ital., N.S., Monogr., 2: 170-171; still treated as a subspecies of Bufo spinulosus by Gorham, 1974, Checklist World Amph.: 84. Córdova, 1999, Stuttgart. Beit. Naturkd., Ser. A—Biol., 600: 1-28, doubted the distinctiveness of this taxon from Rhinella spinulosa (as Bufo).
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