An accurate circumscription of the poorly known Punctelia negata (Nyl.) Krog

The holotype of Punctelia negata and its isotypes were studied and compared to similar species. The type study confi rmed that P. negata has a pale lower surface and lobules on the upper surface rather than a black lower surface and no vegetative propagules, as reported previously. Brazilian collections identifi ed as P. negata present a black lower surface; therefore should be referred to P. borrerina (Nyl.) Krog. At present, P. negata is only known from the type locality in Colombia.