Stereocyclops Cope, 1870 "1869", Proc. Am. Philos. Soc., 11: 165. Type species: Sterocyclops incrassatus Cope, 1870 "1869", by monotypy.
Emydops Miranda-Ribeiro, 1920, Rev. Mus. Paulista, São Paulo, 12: 286. Type species: Emydops hypomelas Miranda-Ribeiro, 1920, by monotypy. Preoccupied by Emydops Broom, 1912. Synonymy by Carvalho, 1948, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 84: 4.
Ribeirina Parker, 1934, Monogr. Frogs Fam. Microhylidae: 115. Replacement name for Emydops Miranda-Ribeiro, 1920. Synonymy by Carvalho, 1948, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 84: 4; Bokermann, 1952, Pap. Avulsos Zool., São Paulo, 10: 287.
Brazilian Dumpy Frogs (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 93).
Atlantic forest of eastern Brazil from Alagoas south to São Paulo.
Most closely allied to (and morphologically more primitive than) Hyophryne and Ctenophryne, according to Carvalho, 1954, Occas. Pap. Mus. Zool. Univ. Michigan, 555: 4. Formerly in the New World component of Microhylinae; 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: 225, did not address this taxon in their study, and they removed Stereocyclops from any subfamily pending resolution of its phylogenetic placement. Van der Meijden, Vences, Hoegg, Boistel, Channing, and Meyer, 2007, Mol. Phylogenet. Evol., 44: 1017-1030, did not address this taxon. Pyron and Wiens, 2011, Mol. Phylogenet. Evol., 61: 543-583, assigned this taxon to Gastrophryninae without comment.
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