• Arthonia epiphyscia Nyl.
Arthonia epiphyscia
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This species has discs (0.10.35mm diam.) that grow directly on the thallus of Physcia species, in particular P. adscendens and P. dubia. They occur in groups, black and rounded with one-septate spores and red-brown internal pigments which turn K+ olive. Spot test reactions are negative. In Ireland, the species has been recorded in Counties Galway and Fermanagh

Key characteristics

  • Discs in groups, black, convex; spores one-septate, hypothecium red-brown
  • On Physcia adscendens or P. dubia.

Original text submitted by

 Simms, M. J., (2016). Arthonia epiphyscia Nyl.. [In] LichenIreland. Accessed on 2018-08-15.