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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
Ocellularia melanotremata Hale

Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 314 (1981)

T: above Enselwatta, Matara District, Southern Province, Sri Lanka, alt. 1100 m, 14 Feb. 1976, M.E.Hale 46241; holo: US.

  Thallus endophloeodal, to c. 50 µm thick, pale to medium grey, dull and greyish-pruinose to rough, continuous, non-rimose. Protocortex discontinuous, to 10 µm thick. Algal layer poorly developed, ±discontinuous; calcium oxalate crystals absent. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.3 mm diam., ±rounded, indistinctly apothecioid, solitary to rarely marginally fused, immersed to raised and hemispherical. Disc with the columella occasionally visible from above, slightly pruinose, dark grey, free, entire. Pores formed by the thalline rim margin, to c. 0.1 mm diam., ±rounded, entire, thin to evanescent and brownish to dark grey due to the protuberant proper exciple; thalline rim incurved. Proper exciple fused, ±thin, evanescent and hyaline below, thicker and brownish to carbonised apically, amyloid at the base. Hymenium to c. 120 µm thick, not inspersed, moderately conglutinated; paraphyses bent to irregular, ±interwoven, unbranched, with unthickened to slightly thickened tips; columellar structures present in older stages, ±poorly developed, to c. 130 µm wide, entire, carbonised, ±covered by greyish granules. Epihymenium hyaline, with or without greyish granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores submuriform, oblong, with rounded ends, hyaline, non-amyloid, 10–23 × 6–9 µm, with 5–7 × 1–3 locules; locules ±angular, initially lentiform, becoming irregular, occasionally fusing centrally and forming a groove; transverse septa regular, moderately thick; ascospore wall thin, non-halonate; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish becoming brown, C–, P+ orange; containing stictic acid (major).
  Very rare in north-eastern Qld; corticolous in lowland rainforest; also in Sri Lanka.  
  Mangold et al. (2009)  

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

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