• Catillaria minuta (A.Massal.) Lettau
Catillaria minuta
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This small lichen with a white thallus and red-brown or orange-brown discs could easily be mistaken for a small poorly-developed Caloplaca species. It grows essentially on limestone screes and occupies shaded crevices and the undersides of stable fragments. The discs (K-) are at first concave. The ellipsoid spores can reach 17Ám long; some spores are waisted at the septum. In Ireland, the species is known from Counties Galway and Armagh.

Key characteristics

  • Small limestone-loving species with a white thallus and red or orange-brown (K-) discs; spores one-septate, some waisted
  • On limestone screes; rare in Ireland.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Catillaria minuta (A.Massal.) Lettau. [In] LichenIreland. Accessed on 2018-06-24.