Xanthoriicola physciae Incertae sedis
Xanthoriicola physciae #

Lichenicolous fungus on Xanthoria parietina
Widespread, locally common on both Xanthoria parietina and X. polycarpa. Can occasionally occur on Physcia species.

Brown, septate hyphae are immersed in the host apothecia. Dark conidiophores produce warty, brown, globose conidia that turn the apothecia and then surrounding dead thallus black and 'sooty' in appearance. Conidia 4-6 x 4-6 m. Microscope photograph below.

Similar: The spores of Opegrapha physciaria are 3-septate, Arthonia molendoi has 1-septate spores

Xanthoriicola physciae

Xanthoriicola physciae

Microscope photographs
Xanthoriicola physciae, conidia
Xanthoriicola physciae
On Xanthoria parietina. Holton Lee, Dorset. February 2013

All images used are copyright. Please contact me if you find errors.