LichenIreland
  • Dictyonema interruptum (Carmich. ex Hook.) Parmasto
Dictyonema interruptum
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Now believed extinct in Ireland this species was formerly known from Turk Cascade, Killarney, County Kerry where it was collected in 1832. It is know to encrust mosses, liverworts and other lichens. It is unusual in that the thallus is a basidio- or mushroom-lichen or, more specifically, a bracket-fungus-lichen. Gauzy-blue-green mats of cyanobacteria overgrowing tree mosses or liverworts should be examined closely and turned over to see if they reveal the giveaway clue, a chalky-white layer, which is masked, when viewed from above.

Key characteristics

  • Thallus, a mat of fibrils encrusting epiphytic mosses, liverworts and lichens
  • Stream gorges and moist relict woodland could be searched for the species.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Dictyonema interruptum (Carmich. ex Hook.) Parmasto. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=21222 Accessed on 2017-10-24.