• Gyalidea fritzei (Stein) Vězda
Gyalidea fritzei
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A very rare crustose lichen of basalt, Gyalidea fritzei grows in damp rock crevices. The thin thallus is often noticeable reddened, the pale orange discs (0.2-0.6mm diam.) becoming at first spherical and then concave. The spores are muriform. It is a species one is only likely to meet if observing its particular habitat narrowly. It has been recorded only from one site in County Antrim.

Key characteristics

  • Slightly reddened thallus with pale orange discs, rounded when young
  • Search for it in crevices of basaltic or mica-schist rocks.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Gyalidea fritzei (Stein) Vězda. [In] LichenIreland. Accessed on 2018-06-22.