Xanthoparmelia skyrinifera is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in Southern Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected from Cape Province at an elevation of about , where it was found growing in a pasture on schist rocks. The lichen thallus, which is loosely attached to its , is bright yellowish green in color and measures in diameter. Although it lacks apothecia (fruiting bodies), it produces numerous pycnidia (asexual fruiting structures) that make conidia (asexual spores) that have a shape and measure 0.5 by 5âÂÂ6 üm. The lichen makes protocetraric acid, usnic acid, and skyrin; it is named for this later substance.