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Icmadophila eucalypti Kantvilas
Nomenclature
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Family: IcmadophilaceaeGenus: Icmadophila
SUMMARY
Mycobank MB 517787
Thallus squamulose, whitish to pale grey, sometimes with a pale bluish, creamish or beige tinge, forming extensive, irregular colonies to 50 cm wide. Individual squamules 1–3.5(–5) µm wide, unevenly 130–350 µm thick and densely inspersed with crystals that fluoresce in polarised light and dissolve in KOH, arising from an effuse, very thin and transient, white primary thallus, scattered and discrete, or imbricate, rarely fusing together, stellate, rosette-like or, more typically, flabellate and with one side tightly adnate to the substratum and the other ascending, initially with crenulate, rather thickened margins, soon becoming nodulose, lobulate or palmately lobed and ± subfruticulose, sorediate; upper surface matt, smooth or minutely granular-scabrid (lens), in section with a pseudocortex 20–30 µm thick comprising randomly orientated, short-celled hyphae 3–5 µm wide, interspersed with occasional dead algal cells; lower surface white, ecorticate; soredia coarsely granular, 40–80 µm diam., concolorous with the thallus, originating at the lower surface of the squamule margins, soon eroding the margin somewhat and spreading acrosss the upper surface. Photobiont a unicellular green alga with globose cells 5–11 µm diam. Ascomata not seen. Pycnidia not seen. Secondary chemistry: thamnolic acid; thallus K+ vivid yellow, P+ orange. KC–, C–, UV–.