Atelopus laetissimus
It is endemic to Colombia and only known from the area of its type locality in the northwestern part of the Sierra Nevada de Santa Marta , in the Magdalena . 
<triplet> Colombia <subj> Magdalena <obj> contains administrative territorial entity <triplet> Sierra Nevada de Santa Marta <subj> Colombia <obj> country <triplet> Magdalena <subj> Colombia <obj> country