Atelopus spurrelli certus Barbour, 1923, Occas. Pap. Mus. Zool. Univ. Michigan, 129: 12. Holotype: MCZ 8538, by original designation; the listing of syntypes by Kluge, 1983, Misc. Publ. Mus. Zool. Univ. Michigan, 166: 23, is in error. Type locality: "from a stream on Mt. Sapo, [Provincia Darién,] eastern Panama".
Atelopus varius certus — Dunn, 1931, Occas. Pap. Boston Soc. Nat. Hist., 5: 397.
Atelopus spurrelli certus — Marx, 1958, Fieldiana, Zool., 36: 426.
Atelopus certus — Rivero, 1963, Caribb. J. Sci., 3: 109. Savage, 1972, Herpetologica, 28: 91.
Darien Stubfoot Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 39).
Cerro Sapo region, 500-1150 m elevation, southwestern Darién, Panama.
Savage, 1972, Herpetologica, 28: 91, recognized this taxon as a species and denied any close relation to Atelopus spurrelli; Cochran and Goin, 1970, Bull. U.S. Natl. Mus., 288: 131, considered it a synonym of Atelopus spurrelli. In the Atelopus ignescens group of Lynch, 1993, Alytes, 11: 77-87. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 163. Ibáñez and Kahn, 2005, in Rueda-Almonacid et al. (eds.), Ranas Arlequines: 118, provided a brief account, photograph, and map.
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