Ramalinaceae Kiliasia episema # (Toninia episema) Lichenicolous on the thallus of Aspicilia calcarea Chemical results: Epithecium greenish-black, K+ green Found on Aspicilia calcarea on hard limestone Thallus immersed in host, producing small clusters of initially immersed black apothecia. Spores persistently 1-septate, (9-)10-14 x 3.5-4.5 µm. Pycnidia absent. Microscope photograph below. Similar: Opegrapha parasitica is also found on Aspicilia calcarea but the spores are 3-septate, 16-22 x 6-8 µm, hyaline becoming brown

Microscope photograph

Toninia episema
On Aspicilia calcarea. Wareham, Dorset. April 2013