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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Fuscidea subasbolodes Kantvilas
  Biblioth. Lichenol. 78: 185 (2001). T: Mt Sprent, Tas., 42°48’S, 145°58’E, 5 Feb. 1987, G.Kantvilas 3/87; holo: HO; iso: M.  
  Thallus pale to dark brown or greyish brown, forming irregular patches several centimetres wide, rimose-areolate, rarely partly blackened, smooth or occasionally somewhat bullate when very well developed, especially around the apothecia, 200–450 µm thick, esorediate; prothallus prominent, black, evident mainly at the margins of the thallus; photobiont cells roundish, 8–16 µm wide; medulla white, I–, K+ yellow → red (needle-like crystals of norstictic acid visible in section). Apothecia scattered or crowded, ±immersed and somewhat perithecia-like when young, becoming emergent, sessile but broadly adnate at the base when mature (‘intercincta-type’ of Oberhollenzer & Wirth, 1984), round or at times deformed by mutual pressure, (0.4–) 0.5–0.8 mm wide, 200–400 µm thick; disc black, ±glossy, plane to slightly concave, rather excavate when old; margin concolorous with disc, glossy, thick, prominent and persistent, raised conspicuously above the level of the disc. Excipulum in section 80–200 µm thick, black, opaque, often extending below the hypothecium. Hypothecium hyaline to pale brown, 25–100 µm thick, typically inspersed with abundant oil droplets 1–4 µm diam.; subhypothecial tissues pale brownish, developing red needle-like crystals of norstictic acid in KOH. Hymenium hyaline to pale brown, 50–70 µm thick, with a dark olive-brown epihymenial layer 10–12 µm thick, intensifying olive in KOH, composed of the pigmented upper portions of the paraphyses. Paraphyses simple or with occasional anastomoses, 1.0–1.5 µm thick, with apices capitate, olive-brown, 3.5–4.0 µm wide. Asci pear-shaped to clavate, (40–) 45–65 × 12–23 µm. Ascospores simple or rarely spuriously 1-septate, colourless, subglobose, ovoid to oblong-ellipsoidal, 6–12 (–13) × 5–8 µm. Pycnidia immersed. Conidia ellipsoidal, 3.0–4.5 × 1.5–2.0 µm. CHEMISTRY: Medulla K+ yellow → red, Pd+ orange, KC–, C–; containing norstictic acid (major).
  Widespread in the mountains of western and south-western Tas. where it occurs on highly siliceous, Precambrian or Ordovician sedimentary rocks in buttongrass moorland and alpine environments; also in Campbell Is., Auckland Is., Falkland Is. and Is. de los Estados (southern Argentina).  
  Kantvilas (2004e)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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