• Staurothele fissa (Taylor) Zwackh
Staurothele fissa
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This crustose, aquatic lichen is characteristic of the submerged zone of streams, rivers and loughs and should be searched for at low water. The grey-green to brown slightly cracked thallus is like a skin. The spherical discs are immersed in warts (0.5 diam) which arise singly and in little clusters. The spores are dark brown, muriform and develop in two-spored asci (sacks containing the spores). Algal cells are present in the discs. Throughout Ireland.

Key characteristics

  • Grey-green to brown, skin-like thallus dotted with prominent perithecia
  • Perithecia immersed in warts; spores two per ascus; algal cells also occur within the disc.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Staurothele fissa (Taylor) Zwackh. [In] LichenIreland. Accessed on 2018-07-16.