Tylothallia verrucosa is a lichen in the family, Lecanoraceae.

[1][2] It was first described as Patellaria verrucosa in 1896 by Johannes Müller Argoviensis.

[1][3] It is found on a wide range of non-calcareous rocks (including dolerite, granite, mudstone and sandstone), exposed to considerable sea-spray, from sea-level to up to 20 metres above the high tide mark.

[2]