A new species in the lichen genus Vahliella from the Canary Islands, including a key to Vahliellaceae, Pannariaceae, and Coccocarpiaceae in Macaronesia

1. Pérez-Vargas, I.
2. Hernández-Padrón, C.
3. Pérez de Paz, P.L.
4. van den Boom, P.P.G.
5. Jørgensen, P.M.