Irish lichens

Arthonia

Order: Arthoniales       Family: Arthoniaceae

Species: Arthonia molendoi

Lichenicolous fungus
Photos: Drinagh area, Co. Cork, SW Ireland.

Correction: Photographs are probably Arthonia parietinaria.

Convex black apothecia (0.1-0.3mm) in clusters of 1-5, epithecium black, hypothecium hyaline or straw-coloured. Asci 4-8 spored, spores 1-septate, constricted at septum, cells unequal, 8-11 x 4-6 Ám.

Scattered distribution on Caloplaca species (and possibly also on Xanthoria parietina).


Arthonia
Arthonia on Xanthoria parietina. December 2011

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