Xanthoparmelia stenosporonica is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in South Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected from the summit of Swartberg Pass (southwestern Cape Province) at an elevation of . The lichen thallus, which Hale described as "inconspicuous", is tightly attached to its rock , has a light yellowish brown color, and measures in diameter. It contains stenosporic acid (for which it is named), colensoic acid, and usnic acid.