Xanthopyreniaceae Zwackhiomyces lithoiceae # Lichenicolous fungus. Photographs on Placopyrenium fuscellum. Rare on the thallus of Placopyrenium fuscellum (was Verrucaria fuscella). Numerous scattered black, globose to pyriform, sessile perithecia. The asci are (2-)4-6(-8) spored, spores 15-20 x 5-7.5 µm, hyaline, 1-septate and slightly constricted at the septa. Periphyses absent but branched and anastomosed interascal filaments are abundant. Micrographs below. Similar: Zwackhiomyces lecanorae is parasitic on Lecanora albescens

Microscope photographs





Zwackhiomyces lithoiceae on Placopyrenium fuscellum
Kimmeridge, Lytchett heath and Wimborne, Dorset. January 2013 and 2014, March 2017