Parmotrema enteroxanthum Hale, 1977
Diagnostic description:
Parmotrema enteroxanthum can be recognized by the yellow medulla (at least the inferior portion), swollen and dactyloid isidia, sublageniform conidia and large ascospores (30‒35 µm long).
As far as we know, there are no other species of Parmotrema with salazinic acid and yellow medulla.
(Spielmann 2009)