Hylodes sulcatus Cope, 1874, Proc. Acad. Nat. Sci. Philadelphia, 26: 126. Holotype: ANSP 11385, according to Malnate, 1971, Proc. Acad. Nat. Sci. Philadelphia, 123: 353. Type locality: "Nauta", Departamento Loreto, Peru.
Eleutherodactylus macrocephalus — Stejneger, 1904, Annu. Rep. U.S. Natl. Mus. for 1902: 582-583. by implication; Peters, 1955, Rev. Ecuat. Entomol. Parsitol., 2: 348.
Hylodes macrocephalus Peracca, 1904, Boll. Mus. Zool. Anat. Comp. Univ. Torino, 19 (465): 29. Syntypes: MZUT 206 (2 specimens); larger specimen designated lectotype by Lynch, 1975, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 38: 1-46. Type locality: "Valle Santiago", Morona-Santiago Province, Ecuador. Synonymy by Lynch, 1975, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 38: 33.
Ctenocranius koki Melin, 1941, Göteborgs K. Vetensk. Vitterh. Samh. Handl., Ser. B, 1: 49. Holotype: NHMG 494, according to Duellman and Lehr, 2009, Terrest.-breeding Frogs in Peru: 264. Type locality: "Taracuá, Rio Uaupés, [Estado Amazonas,] Brazil". Synonymy by Lynch, 1975, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 38: 33.
Eleutherodactylus koki — Myers, 1962, Copeia, 1962: 198. By implication.
Eleutherodactylus sulcatus — Gorham, 1966, Das Tierreich, 85: 103.
Eleutherodactylus (Eleutherodactylus) sulcatus — Lynch, 1996, in Powell and Henderson (eds.), Contr. W. Indian Herpetol.: 154. Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 233.
Limnophys sulcatus — Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, Suppl. Inform., 104: Table 2.
Strabomantis sulcatus — Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 131.
Nauta Robber Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 79).
Upper Amazon basin (150-950 m) in western Brazil, eastern Ecuador, and eastern Peru, likely into Amazonian Colombia.
In the Eleutherodactylus (Eleutherodactylus) sulcatus series, Eleutherodactylus sulcatus group according to Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 233. See account by Lynch, 1975, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 38: 1-46. See account by Lynch, 1997, Rev. Acad. Colomb. Cienc. Exact. Fis. Nat., 21: 366. In the Strabomantis biporcatus species series, Strabomantis cornutus species group of Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 131. See Duellman and Lehr, 2009, Terrest.-breeding Frogs in Peru: 264, for brief account.
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