Phyllomedusa is a genus of tree frog from Central and South America. It ranges from Costa Rica southward toArgentina. It has around 30 species.
Some Phyllomedusa species produce a waxy secretion that reduces the evaporative water loss of their bodies. If they begin to dry out, they move their limbs over their backs, where the secretory glands are, and spread the lipid secretion over their entire skin. source