Parmotrema expansum Hale, 1977
Diagnostic description:
Parmotrema expansum is recognized by the effigurate maculae, commonly furcated cilia, black undersurface and ascospores medium-sized 16–20 µm long.
Other species with usually branched (cespitose) cilia also have lichexanthone in the medulla, like P. lichexanthonicum (without vegetative propagules) and P. spinibarbe (sorediate).
(Spielmann 2009)