Willeya fusca

Willeya fusca is a species of saxicolous (rock-dwelling), crustose lichen in the family Verrucariaceae. Found in Vietnam, it was formally described as a new species in 2014 by Cécile Gueidan. The species epithet fusca refers to its characteristic dark brown areolate thallus, a feature that distinguishes it from other Willeya species.