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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 gallowayanum Mangold, Elix & Lumbsch

in A.Mangold, H.T.Lumbsch & J.A.Elix, Biblioth. Lichenol. 95: 465 (2007)

T: Tumoulin Rd, 5 km from turnoff to Ravenshoe, Atherton Tableland, Qld, 2003, H.T.Lumbsch & A.Mangold 19151t; holo: CANB; iso: BRI.

  Thallus endophloeodal to epiphloeodal, to c. 400 µm thick, pale greyish green to pale yellowish grey, dull, smooth to rough, verruculose to verrucose or continuous, rimose. Protocortex discontinuous, to c. 20 µm thick. Algal layer continuous or discontinuous, poorly to well developed; calcium oxalate crystals abundant, small to large, scattered or clustered. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.8 mm diam., ±rounded, perithecioid, solitary, immersed to emergent, then mostly hemispherical. Disc not visible from above. Pores minute to small, to c. 0.12 mm diam., ±rounded, entire, the apex of the proper exciple occasionally becoming visible from above, then forming a fused to completely free inner pore margin, often ±sunken, incurved, predominantly off-white; otherwise the pore margin formed by the thalline rim. Thalline rim margin thick, ±rounded, entire, concolorous with the thallus to whitish or brownish, level with the thalline rim; rim not distinguishable from the thallus in immersed ascomata, incurved in emergent ascomata. Proper exciple partly fused to completely free, thin, hyaline to pale yellowish internally, yellowish grey marginally, non-amyloid. Hymenium to c. 500 µm thick, not inspersed, moderately conglutinated; paraphyses thin, bent, parallel to slightly interwoven, unbranched, the tips slightly thickened; lateral paraphyses inconspicuous, not conglutinated, to c. 30 µm long; columellar structures absent. Epihymenium hyaline, without granules and crystals. Asci 1 (–2)-spored; tholus initially thick, thin when mature. Ascospores muriform, mostly oblong-fusiform, occasionally slightly irregular in outline, straight to slightly bent, the ends strongly tapered and forming short conical appendixes with 3–6 transverse locules, brown to yellowish brown, non-amyloid to faintly amyloid, 180–350 (–400) × 20–45 (–50) µm, with numerous locules; locules ±rounded to angular, especially in later stages, subglobose to oblong or irregular; transverse septa thin, remaining distinct and regular throughout development; 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).
  A corticolous endemic in eastern Qld and north-eastern N.S.W.; in rainforest at altitudes to 1100 m.  
  Mangold et al. (2009)  

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

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