Parmotrema neotropicum Kurok., 1977
Diagnostic description:
Parmotrema neotropicum is distinguished by the isidiate thallus, the isidia sometimes breaking up in soredioid granules, the effigurate maculae, the abundantly veined, brown undersurface with dimorphic rhizines and the presence of usnic acid.
It can be confused with P. subtinctorium, but in this species the isidia remain entire, the undersurface is only slightly rugose to papillate, the usnic acid is absent, and produces norlobaridone in the medulla.
The holotype is composed by two distinct thalli (i.e., not parts of the same thallus) that agree with each other in all important features.
[Spielmann 2009]