Xanthoparmelia globisidiosa 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 on large sandstone boulders in a pasture. The lichen has a light yellowish-green thallus that measures broad, comprising short, overlapping that are 1–2 mm wide. It contains stictic acid, constictic acid, and usnic acid.
See also List of Xanthoparmelia species
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