Cycloramphus Tschudi, 1838, Classif. Batr.: 81. Type species: Cycloramphos fulginosus Tschudi, 1838, by monotypy.
Cycloramphos — Tschudi, 1838, Classif. Batr.: 41. Alternative spelling.
Cyclorhamphus — Agassiz, 1845, Nomencl. Zool., Fasc. 7 & 8: 110. Incorrect subsequent spelling.
Pithecopsis Günther, 1859 "1858", Cat. Batr. Sal. Coll. Brit. Mus.: 22. Type species: Cycloramphus fulginosus Tschudi, 1838, by monotypy. Synonymy by Boulenger, 1882, Cat. Batr. Sal. Coll. Brit. Mus., Ed. 2: 189.
Grypiscus Cope, 1867, J. Acad. Nat. Sci. Philadelphia, Ser. 2, 6: 206. Type species: Grypiscus umbrinus Cope, 1866, by monotypy. Synonymy by Lutz, 1929, Mem. Oswaldo Cruz, Rio de Janeiro, 22: 9.
Iliodiscus Miranda-Ribeiro, 1920, Rev. Mus. Paulista, São Paulo, 12: 267. Type species: Iliodiscus dubius Miranda-Ribeiro, 1920, by subsequent designation of Gorham, 1966, Das Tierreich, 85: 46, and Lynch, 1971, Misc. Publ. Mus. Nat. Hist. Univ. Kansas, 53: 139. The designation as type species of Telmatobius brasiliensis Steindachner, 1864, by Bokermann, 1951, Arq. Mus. Nac., Rio de Janeiro, 42: 80, was in error because this taxon was not part of the original concept, according to Lynch, 1971, Misc. Publ. Mus. Nat. Hist. Univ. Kansas, 53: 139. Synonymy by Lutz, 1929, Mem. Oswaldo Cruz, Rio de Janeiro, 22: 9.
Craspedoglossa Müller, 1922, Bl. Aquar. Terrarienkd., Stuttgart, 33: 167. Type species: Craspedoglossa santae-catharinae Müller, 1922, by monotypy. Synonymy by Heyer, 1983, Arq. Zool., São Paulo, 30: 288.
Niedenia Ahl, 1924, Zool. Anz., 58: 107. Type species: Niedenia spinulifer Ahl, 1923, by monotypy. Synonymy by Noble, 1926, Am. Mus. Novit., 212: 14.
Button Frogs (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 71).
Southeastern Brazil.
Heyer, 1983, Arq. Zool., São Paulo, 30: 235-339, revised and reviewed the genus. Heyer and Maxson, 1983, Arq. Zool., São Paulo, 30: 341-373, discussed relationships, zoogeography, and speciation mechanisms. Lingnau, Solé, Dallacorte, and Kwet, 2008, North-West. J. Zool., Romania, 4: 224-235, discussed evidence and distribution of reproductive modes.
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