Medium sized frog. Dorsum dark with a pattern in silverish white, normally consisting of a triangle on top of the snout continuing into a broad dorsolateral stripe to the groin. A light spot in the lumbar region, sometimes confluent with the dorsolateral stripes, and two light spots on tibia, or tibia uniformly light. Although normally constant in pattern, individuals in some populations can vary considerably, e.g. having a light middorsal stripe or even a uniform light dorsum.