Incertae sedis Phacothecium varium # (Opegrapha physciaria) Lichenicolous fungus. Photographs on Xanthoria parietina Infrequently recorded on the thallus of Xanthoria parietina. Most records are from coastal areas BLS conservation evaluation: LC NR Black apothecia (0.2-0.3mm wide) are initially immersed in the host thallus and then become superficial, usually with several clustered into an irregularly shaped wart-like structure. The asci are 8-spored, the spores hyaline becoming brown, 3-septate, 12-18 x 4-6(-8) µm with a thin perispore. Conidia hyaline, simple, 6-7.5 x 1 µm. Exciple K+ brownish-red in section. Micro photographs below.

Microscope photographs




Opegrapha physciaria (Phacothecium varium)
Holton Lee and Studland, Dorset. December 2012 and May 2015