Family: Ramalinaceae Species: Lecania cyrtellina Growth type crustose Photos: Killarney NP, Co. Kerry, SW Ireland. Thin pale greyish thallus with convex, pale pink, brownish or piebald apothecia that become translucent when wet. The thalline margin is thin, white when young, and the true exciple is dark. Asci 8-spored, spores 0(-1) septate, 8-12(-15) x 2-3(-4) µm. Pycnidia dark, the microconidia curved, 12-18 x 0.5 µm, macroconidia 0-1 septate, crescent-shaped, 10-15(-18) x 1.5-2 µm. Micrograph below. Photobiont chlorococcoid. Chemistry negative Infrequent (but possibly over-looked) on shaded, base-rich bark but not associated with Xanthorion species. Similar: Lecania cyrtella has wider 1(-3) septate spores and is usually part of the Xanthorion community on nutrient-rich bark

Micrograph

Lecania cyrtellina. August 2024