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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
Thelotrema eungellaense Mangold, Elix & Lumbsch

in A.Mangold, H.T.Lumbsch & J.A.Elix, Biblioth. Lichenol. 95: 463 (2007)

T: trail from Broken River Station to rainforest, Eungella Natl Park, Qld, 2003, H.T.Lumbsch & A.Mangold 19108k; holo: CANB; iso: BRI.

  Thallus endophloeodal to epiphloeodal, to c. 400 µm thick, pale greyish or yellowish green to olive, dull, smooth, ±verrucose, rimose. True cortex continuous or discontinuous, to c. 50 µm thick, consisting of irregular or periclinal hyphae. Algal layer continuous or not, poorly developed to well developed; calcium oxalate crystals abundant, small to large, scattered or clustered. Vegetative propagules not seen. Ascomata to c. 0.8 mm diam., ±rounded, perithecioid, solitary, immersed to emergent, then verrucose-hemispherical to subglobose. Disc not visible from above. Pores small, to c. 0.15 mm diam., ±rounded, entire, the apex of the proper exciple usually becoming visible from above, forming an inner pore margin that is usually completely free, often slightly sunken, incurved, whitish. Thalline rim margin thick, ±rounded, usually entire, rarely slightly split, usually whitish, occasionally concolorous with the thallus, rarely brownish, level with the thalline rim to ±annulate or funnel-shaped, rarely sunken; thalline rim inconspicuous in immersed ascomata, incurved in emergent ascomata. Proper exciple partly fused to entirely free, thick, hyaline to pale yellowish internally, yellowish grey marginally, occasionally apically brownish, non-amyloid, rarely faintly amyloid at the base. Hymenium to c. 400 µm thick, not inspersed, moderately conglutinated; paraphyses thin, distinctly bent or curly towards the slightly thickened tips, parallel to slightly interwoven, unbranched; lateral paraphyses usually inconspicuous, not conglutinated, to c. 40 µm long; columellar structures absent. Epihymenium hyaline, without granules and crystals. Asci 2–4-spored; tholus initially thick, thin when mature. Ascospores muriform, mostly ellipsoidal to fusiform, rarely slightly bent, with narrowly rounded to subacute ends, hyaline, rarely pale yellowish at late maturity, non-amyloid to faintly amyloid at maturity, 80–180 × 20–40 µm, with numerous locules; locules small, ±rounded to slightly angular, subglobose to ±rounded-cuboidal or irregular; transverse septa thin, distinct throughout development, regular to slightly irregular; ascospore wall thin, non-halonate; endospore thin. Pycnidia not seen.
CHEMISTRY: Thallus K+ orange-red, C–, P–; containing norstictic acid (major), connorstictic acid (minor to trace).
  An endemic, corticolous species in montane rainforest in eastern Qld, at altitudes of 600–1500 m.  
  Mangold et al. (2009)  

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

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