Hafellner (2009) revised the lichenicolous opegraphoid species with discoid ascomata and included them in either Phacothecium or the newly erected genus Phacographa, discussing the generic concepts in that group and providing a key to the species. Lumbsch & Huhndorf (2010) included Phacographa in the Roccellaceae, but in a recent systematic revision of the Arthoniales, Ertz & Tehler (2010) resurrected the family Opegraphaceae and, although they did not include Phacographa in the study, they did mention that it had affinities to Opegrapha. Presently, the genus is included in the Lecanographaceae. The species are non-lichenised, but they were frequently treated by lichenologists, because they were formerly included in the genera Opegrapha or Arthonia, both of which comprise many lichenised species.
Last modified: July, 24, 2025

Project Dryades, Department of Life Sciences, University of Trieste - CC BY-SA 4.0