Order: Lecanorales Family: Ramalinaceae
Species: Catinaria atropurpureaGrowth type crustose. Left and below identified by Andy Acton
Photos: Ardnagashel and Droum Wood, Co. Cork, SW Ireland.
Thin, evanescent, pale to dark grey-brown thallus that is often minutely granular. Apothecia to 0.75mm, dark reddish-brown to blackish with wide margins. Margins dark brown at outer edge, pale brown or colourless within, excluded with age. Hymenium colourless. Asci 8-spored, spores 1-septate, 10-15 x 5-7 Ám, walls to 1.5 Ám. Micro photographs below. Chemical reactions and UV negative.
Rough-barked mature trees and over mosses, usually in Lobarion communities in old woods and parklands. Scattered distribution.
When sterile the thallus resembles Porina coralloidea.
Similar: Lecidea hypnorum. Calcareous substrates, rare on bark. UV+ white