Lecidea aptrootii

Lecidea aptrootii is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecideaceae. It is found in northwestern Pakistan, where it grows on exposed siliceous rocks. The lichen was formally described as a new species in 2018 by Memoona Khan, Abdul Khalid, and H. Thorsten Lumbsch. The type specimen was collected in the Gabin Jabba valley (Swat District, Khyber Pakhtunkhwa) at an altitude of 1600 m. This area has a moist temperate climate, with snowfall during winter and much rainfall during summer. The species epithet honours Dutch lichenologist André Aptroot, who suggested to the authors that the taxon might represent a new species.