• Arthothelium spectabile Flot. ex A.Massal.
Arthothelium spectabile
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(Map updated: 11 August 2009)

Although presumed extinct in Ireland this should not deter the lichen hunter. In fact, it is virtually identical to A. norvegicum (described elsewhere) in all external features other than the discs that grow to twice the size (to 1.2mm diam.). Its habitat requirements in Ireland are unknown; the species has become extinct in the UK. Smooth-barked trees in ravine woodlands appear to be its European headquarters.

Key characteristics

  • Like A. norvegicum in all external features; it is currently believed extinct
  • Differs from the above in the larger discs and in some details of the disc tissues.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Arthothelium spectabile Flot. ex A.Massal.. [In] LichenIreland. Accessed on 2021-01-22.