Eleutherodactylus ruidus Lynch, 1979, Misc. Publ. Mus. Nat. Hist. Univ. Kansas, 66: 40. Holotype: AMNH 17590, by original designation. Type locality: "Molleturo, Provincia Azuay, Ecuador, 2317 m."
Eleutherodactylus (Eleutherodactylus) ruidus — Lynch, 1996, in Powell and Henderson (eds.), Contr. W. Indian Herpetol.: 154. Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 130-131.
Pristimantis ruidus — Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, Suppl. Inform., 104: Table 2.
Pristimantis (Pristimantis) ruidus — Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 128.
Molleturo Robber Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 79).
Known only from the type locality at 2317 m in cloud forest on the Pacific slopes of the Cordillera Occidental in the Province of Azuay, Ecuador.
This species may represent a southern vicariant of Eleutherodactylus orcesi and Eleutherodactylus thymelensis, according to Lynch, 1979, Misc. Publ. Mus. Nat. Hist. Univ. Kansas, 66: 43. See account by Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 130-131, who placed it in the Eleutherodactylus (Eleutherodactylus) martinicensis series, Eleutherodactylus unistrigatus group. In the Pristimantis (Pristimantis) unistrigatus species group of Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 128.
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