Parmeliella zeylanica is described as a new species in the P. mariana group, although it differs from all known species in the group by not having radiating marginal lobes resting on a distinct mat of rhizohyphae. It is as yet known only from the highlands of Sri Lanka. The new combination Parmeliella leiostroma (Nyl.) P. M. Jørg. is made for a closely related species from the same region, and it is shown that Parmeliella endomilta var. achromatica Makhija & Adawara falls within the variation of Parmeliella mariana (Fr.) P. M.Jørg. & D. J. Galloway, and is not closely related to P. endomilta.
