• Lecanora gangaleoides Nyl.
Lecanora gangaleoides
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(Map updated: 11 August 2009)

This lichen could almost be Tephromela atra so alike are they, but differs in having a more warted and a slightly duller thallus with rounded discs. The best way to distinguish them is to pick away at the discs with a fingernail. In L. gangaleoides, orange arthraquinones are stored below the surface of the crust in the medulla and so should be exposed. Try this scratch test in a couple of different places. It is essentially a coastal lichen species and in places both it and Tephromela atra grow side by side. In Ireland it appears more frequent in the north and west.

Key characteristics

  • Duller thallus and more rounded discs than its lookalike Tephromela atra
  • Has orange pigmentation in the medulla: a scratch test should be carried out as explained above. Coastal.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Lecanora gangaleoides Nyl.. [In] LichenIreland. Accessed on 2019-03-23.