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Atelopus ignescens has uniformly black coloration on its back and flanks, with small round warts covering most of the back. The venter is wrinkled and is bright orange to red in life, becoming darker in the gular region and lighter on the belly. The ventral surfaces of the limbs are black, except for the forelimbs, which are orange-red underneath. The iris is black. In preservative the bright underside turns to a cream color with some poorly defined black markings (Coloma et al. 2000).