Atelopus pastuso Coloma, Duellman, Almendáriz, Ron, Terán-Valdez, and Guayasamin, 2010, Zootaxa, 2574: 20. Holotype: QCAZ 15013, by original designation. Type locality: "near a lake in Voladero, Páramo de El Angel (approx. 0° 41′ N, 77° 53′ W; ca 3750 m), Provincia Carchi, Ecuador".
None noted.
Known only from páramo and subpáramo habitats from Departamento Nariño in southern Colombia to Provincia Imbabura in northern Ecuador, 2800-3900 m elevation.
Considered to be extinct or nearly so in the original publication and (formerly) hybridizing in northern Ecuador with Atelopus ignescens.
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