Irish lichens

Opegrapha rupestris

Order: Arthoniales       Family: Opegraphaceae

Species: Opegrapha rupestris

Growth type crustose. Parasitic.
Photos: Parasitic on Verrucaria. Black Head, the Burren, Ireland.
BLS Burren meeting 2009

Thallus barely visible. Scattered clusters of small, +/- rounded lirellae with a persistently narrow central slit. Spores are 3-septate, 14-22 5-8 m, hyaline becoming brown when over-mature

Lichenicolous on Bagliettoa baldensis (Verrucaria baldensis) and Bagliettoa calciseda (calciseda) on natural limestone rocks and memorials, but most frequent on Verrucaria baldensis. Recorded from northern and western Ireland.

Opegrapha rupestris

Opegrapha rupestris
Opegrapha rupestris. BLS Burren meeting, April 2009

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