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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
Ropalospora lugubris (Sommerf.) Poelt
  in H.Hertel, Schedae ad Lecideaceae Exsicc. 2: [40] (1980); Lecidea lugubris Sommerf., Suppl. Fl. Lappon. 143 (1826). T: Europe, n.v.  
  Thallus forming irregular spreading patches to c. 10 cm wide, pale to dull grey to brownish grey, rimose-areolate, 140–200 µm thick, with the areoles ±angular, mostly 0.2–0.5 mm wide, contiguous or dispersed over a blackish prothallus, esorediate; photobiont cells ±roundish, 8–12 µm wide; medulla I–. Apothecia scattered, roundish, constricted at the base, 0.4–0.8 mm wide, 250–400 µm thick; disc plane, becoming convex in very old apothecia, black or rarely faintly greyish pruinose; margin black, persistent, glossy, mostly extending somewhat above the disc. Excipulum in section 60–100 (–160) µm thick, opaque dark brown at the outer edge, becoming pale olive-brown within, with the pigment ±intensifying olive in KOH. Hypothecium hyaline to pale brown, I–, 100–180 µm thick, inspersed with oil droplets 1–6 µm diam. Hymenium hyaline, 80–120 µm thick, with a dark olive-brown epihymenial zone to 20 µm thick, composed of the pigmented upper portions of the paraphyses. Paraphyses 1.5–2.0 µm thick, mostly simple, with apices expanded to 3.5–6.0 µm and pigmented brown to olive-brown. Asci8-spored, 60–80 × 16–24 µm. Ascospores narrowly fusiform, typically ±rounded at one apex and attenuated into a tail at the other, 6–9 (–11)-septate, 29–58 × 4.0–6.5 µm, arranged side-by-side in the ascus with the ‘tails’ downwards. Pycnidia immersed. Conidia 4–6 × 1 µm. CHEMISTRY: Thallus K–, C–, KC–, Pd–, UV–; containing lichesterinic acid.
  Occasional in the mountains of western and south-western Tas. where it grows on highly siliceous, metamorphosed, Precambrian and Ordovician sedimentary rocks in heathland and buttongrass (Gymnoschoenus) moorland. Also known from Europe, North America and South Africa.  
  Kantvilas (2004e)  

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

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