Cacotus calcaratus Günther, 1881, Proc. Zool. Soc. London, 1881: 19. Holotype: BMNH 1868.9.22.8 by museum records, according to Lavilla, Nuñez, Rabanal, Langone, and de Sá, 2010, Zootaxa, 2561: XXX. . Type locality: "Chiloé" Island, Chile.
Borborocoetes calcaratus — Boulenger, 1882, Cat. Batr. Sal. Coll. Brit. Mus., Ed. 2: 256.
Zachaenus roseus Cope, 1890 "1889", Proc. U.S. Natl. Mus., 12: 142. Holotype: USNM 15126 according to Cochran, 1961, Bull. U.S. Natl. Mus., 220: 81. Type locality: "Port Otway, Patagonia"; corrected to "Puerto Almirante Barroso (= Port Otway), 46°49′-75°21′, Península de Taitao, Chile" by Lavilla, Nuñez, Rabanal, Langone, and de Sá, 2010, Zootaxa, 2561: 49-58, who made the synonymy.
Eupsophus calcaratus — Capurro-S., 1958, Invest. Zool. Chilen., 4: 293. Formas and Vera, 1982, Proc. Biol. Soc. Washington, 95: 594.
Chiloe Island Ground Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 80).
Rosy Bug-eyed Frog (Zachaenus roseus [no longer recognized]: Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 85).
Southern Chile and adjacent Argentina (provinces of Chubut, Río Negro, and Neuquen).
Discussed by Formas and Vera, 1982, Proc. Biol. Soc. Washington, 95: 594-601. In the Eupsophus vertebralis group. Synonymy (with Eupsophus grayii) by Cei, 1960, Breviora, 118: 1-13, and Cei, 1962, Invest. Zool. Chilen., 8: 33. Synonymy with Eupsophus roseus by Grandison, 1961, Bull. Brit. Mus. (Nat. Hist.), Zool., 8: 128; Gorham, 1974, Checklist World Amph.: 60, and Lavilla, 1994 "1992", Acta Zool. Lilloana, 42: 84. Christie and Úbeda, 1996, Herpetol. Rev., 27: 149. provided a new record for Argentina and noted that previous records were based on Eupsophus roseus. Úbeda, 2000, Cuad. Herpetol., 14: 71-74, discussed the distribution in Argentina. Díaz-Páez and Berrios, 2003, Herpetol. Rev., 34: 380, provided a record for Isla Berta and Isla Juan Stuven, Region de Aysen, Chile.
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