Phyllopsoraphaeophysciae sp. nov., having a lichenicolous habitat is growing on thallus of lichen Phaeophyscia and distinguished by white prothallus, globose to cylindrical isidia and thallus containing atranorin. Based on the previously published literature, Phylloposra species mostly reported to grow on bark, rock, soil and sometimes in association of mosses, however the new taxa is exhibit a unique lichenicolous habitat, luxuriantly growing on Phaeophyscia hispidula species in temperate region the country. In India, this is the first Phyllopsora species which is growing on Physciaceae family member. squamulose, taxonomy, new species, Western Himalaya, GENUS PHYLLOPSORA