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Crocynia microphyllina Aptroot
Nomenclature
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Family: CrocyniaceaeGenus: Crocynia
SUMMARY
Mycobank MB 517760
Thallus corticolous, crustose, pale greenish white, byssoid, dull, consisting of ca. 0.4–2.0 mm diam crenate thallus areoles of irregular surface and outline on a continuous layer of black arachnoid hypothallus that is underlying the whole thallus, covering areas of up to 10 cm diam, margins delimited by a continuous hypothallus, forming a line of up to 1 mm. Hypothallus filaments 2–3 µm wide, branching mostly perpendicular, surface partly rough from crystals. Phyllidia numerous, ascending, starting at the margins of the areoles, up to 0.3 mm diam and generally ca. 0.2 mm high, scarcely confluent, pale greenish white (not contrasting with the thallus), flattened to globular to irregular, internally formed of branched and gnarled hyphae with copious crystals. Algae chlorococcoid, cells ellipsoid, ca. 5 × 7 µm. Apothecia and pycnidia unknown. Secondary chemistry: protocetraric acid.