• Collemopsidum halodytes (R.Sant.) Grube & B.D.Ryan
Collemopsidum halodytes
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An inconspicuous but very common lichen. Usually only the dark perithecia, about 0.25mm across, are visible immersed in the shells of limpets and barnacles.

Key characteristics

  • Tiny black perithecia immersed in shells of barnacles and limpets.
  • Exclusively marine.

Original text submitted by Michael Simms

 Simms, M. J., (2016). Collemopsidum halodytes (R.Sant.) Grube & B.D.Ryan. [In] LichenIreland. Accessed on 2019-01-16.