Atelopus longirostris Cope, 1868, Proc. Acad. Nat. Sci. Philadelphia, 20: 116. Type(s): Not stated, although likely originally in ANSP or USNM; apparently lost as not located in ANSP or USNM according to Peters, 1973, Smithson. Contrib. Zool., 145: 27. Type locality: "Valley of Quito", Ecuador; probably in error according to Peters, 1973, Smithson. Contrib. Zool., 145: 28.
Antelopus longirostris — Orton, 1876, Andes and the Amazons: 108. Incorrect subsequent spelling of the generic name.
Phryniscus longirostris — Boulenger, 1882, Cat. Batr. Sal. Coll. Brit. Mus., Ed. 2: 153.
Phryniscus boussingaulti Thominot, 1889, Bull. Soc. Philomath., Paris, Ser. 8, 1: 28. Holotype: MNHNP 207, according to Guibé, 1950 "1948", Cat. Types Amph. Mus. Natl. Hist. Nat.: 32. Type locality: "entre Latacungua et Guayaquil, au sud de Quito"; considered to be "Equateur" by Guibé, 1950 "1948", Cat. Types Amph. Mus. Natl. Hist. Nat.: 32. Synonymy by Boulenger, 1890, Zool. Rec., 26: 21; Guibé, 1950 "1948", Cat. Types Amph. Mus. Natl. Hist. Nat.: 32.
Atelopus longirostris — Boulenger, 1894, Ann. Mag. Nat. Hist., Ser. 6, 14: 374-375.
Atelopus longirostris marmorata Werner, 1901, Verh. Zool. Bot. Ges. Wien, 51: 600. Types: NHMW, lost according to Peters, 1973, Smithson. Contrib. Zool., 145: 43. Type locality: "Ecuador". Considered a nomen dubium by Peters, 1973, Smithson. Contrib. Zool., 145: 43.
Atelopus longirostris marmoratus — Rivero, 1963, Caribb. J. Sci., 3: 108.
Longnose Stubfoot Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 39).
Northwestern versant of the Andes of Ecuador, in the provinces of Esmeraldas, Imbabura, Cotopaxi, and Pichincha; western slope of the Cordillera Occidental in Valle del Cauca, Colombia.
In the Atelopus flavescens group of Lynch, 1993, Alytes, 11: 77-87. See Cannatella, 1981, J. Herpetol., 15: 135-137, for discussion, and Peters, 1973, Smithson. Contrib. Zool., 145: 27-30, for discussion and accounts. Lötters, 1996, Neotrop. Toad Genus Atelopus: 34, discussed controversy over identity of frogs from Colombia (Departamento Valle and Departamento Santander) assigned to this species by other authors. See map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 136, who regarded the species as extinct. Galvis-Peñuela and Cisneros-Heredia, 2005, in Rueda-Almonacid et al. (eds.), Ranas Arlequines: 53, provided a brief account, opined that the Colombia population might represent a distinction species, and also judged the species extinct in Ecuador.
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