Order: Teloschistales       Family: Teloschistaceae Species: Coppinsiella ulcerosa (Caloplaca ulcerosa) Growth type crustose. Identification needs confirming Photos: On deciduous tree trunk. Foynes, Co. Limerick, Ireland Thin grey-white thallus with pale yellowish-green soredia from blister-like craters. Soralia initially scattered but often become confluent. Scattered apothecia with orange discs, margins narrow. Spores 8-12 x 4-8 µm, septum 3-6 µm wide. Paraphyses with swollen tips. Apothecia and soredia K+ red Infrequent on nutrient-enriched mature trees in well-lit situations Similar: Caloplaca obscurella has brownish discs, thallus becomes bright green when wet, apothecia and thallus K-

Coppinsiella ulcerosa (Caloplaca ulcerosa). September 2010