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 thesaurum Mangold | ||
in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 658 (2009) T: Dawson L.A., 24 km S of Koombooloomba turnoff, WSW of Tully, Qld, 21 July 1983, M.E.Hale 832638; holo: US. |
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| Thallus endophloeodal to epiphloeodal, to c. 300 µm thick, yellowish brown to pale olive, waxy, smooth, ±verrucose, rimose. True cortex yellowish, to c. 50 µm thick, consisting of irregular hyphae. Algal layer continuous and well developed; calcium oxalate crystals abundant, especially near ascomata, solitary, rarely clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded, perithecioid to indistinctly apothecioid, sessile, solitary or fused, emergent, subglobose to urceolate. Disc not visible from above. Pores small, to c. 0.3 mm diam., ±rounded to slightly irregular, the apex of the proper exciple visible from above, free, predominantly entire to slightly split, whitish, usually incurved and ±shrunken. Thalline rim margin thick, ±rounded, entire to slightly split, becoming eroded, whitish, distinctly greyish-pruinose when eroded; thalline rim usually concolorous with the thallus, often distinctly fissured, incurved. Proper exciple free, thin to thick, hyaline to pale yellowish internally, yellowish brown marginally, the apex covered with greyish granules, non-amyloid, occasionally amyloid at the base. Hymenium to c. 220 µm thick, not inspersed, moderately conglutinated; paraphyses ±bent, ±interwoven, the tips slightly thickened and somewhat irregular; lateral paraphyses conspicuous, to c. 30 µm long; columellar structures absent. Epihymenium yellowish brown, with greyish or brownish granules. Asci (4–) 6–8-spored; tholus thick, thin when mature. Ascospores muriform, oblong to ellipsoidal, with ±rounded to narrowly rounded ends, usually hyaline, rarely becoming pale yellowish, non-amyloid to faintly amyloid, 60–120 (–130) × 20–30 µm, with numerous locules; locules ±rounded to angular, subglobose to irregular; transverse septa thin, regular to slightly irregular, becoming indistinct; ascospore wall thin, non-halonate; endospore thin. Pycnidia not seen. CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), constictic acid (major), cryptostictic acid (trace), a-acetylconstictic acid (trace), hypoconstictic acid (trace), hypostictic acid (trace). |
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| An endemic, corticolous species in rainforest in north-eastern Qld, at altitudes of 100–1100 m. | ||
| Mangold et al. (2009) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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