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Caloplaca digitaurea Søgaard, Søchting & Sancho
Nomenclature
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Family: TeloschistaceaeGenus: Caloplaca
SUMMARY
Mycobank MB 517745
Thallus fruticulose, composed of mostly vertical, terete to rarely flattened, moderately branched, isidia-like lobules dispersed among mosses or cyanobacteria and sometimes forming up to 2 mm high, compact cushions; vertical lobules 60–100 µm thick and up to 1500 µm high, slightly moniliform, at the thallus edge slightly flattened and more horizontal, color vivid orange yellow to vivid orange with uneven, matt surface. Photobiont trebouxioid. Apothecia sparse, embedded between the lobes, 0.8–1.5 mm with regular to flexuouse margin, initially zeorine with a proper margin concolorous with disc and an isidiate thalline margin concolorous with thallus, later lecanorine with an elevated margin, which is often obscured by isidia; disc deep orange, darker than thallus, flat; episamma medium coarse. Exciple fan shaped, laterally ca. 80 µm, centrally ca. 20 µm. Hymenium 60–100 µm; paraphyses branched with slightly thickened end cells, up to 4 µm. Asci clavate with 8 spores. Spores ellipsoid, polarbilocular, (12.5–)13–16(–18) x (5–)6–7.5(–8) µm; septum narrow, (1–)1.5–2.5(–3.5) µm. Pycnidia not observed. Secondary chemistry (HPLC): parietin (major), teloschistin (minor), fallacinal (minor), parietinic acid (minor), emodin (minor); conforms to chemosyndrome A according to Søchting (1997).