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 | ||
| Letrouitia aureola (Tuck.) Hafellner & Bellem. | ||
Nova Hedwigia 35: 281 (1982) Lecidea aureola Tuck., Proc. Amer. Acad. Arts Sci. 6: 281 (1864). T: Cuba, C.Wright; holo: FH n.v.; iso: H-NYL n.v. |
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| Thallus yellow-brown or dull to bright orange, thin, membranous; soredia and isidia absent. Apothecia common and scattered over the thallus, sessile, constricted at the base, 0.3–1.0 mm wide; disc orange, ±plane; margin prominent, rather fragile, orange; disc and margin K+ purple; proper exciple without a distinct medullary layer. Epihymenium and margin encrusted with anthraquinone crystals. Hymenium not inspersed, colourless, 60–80 μm thick; hypothecium colourless to pale brown. Asci 8-spored, 50–60 × 9–13 μm. Ascospores narrowly ellipsoidal, transversely septate, with 6–8 ovoid to lens-shaped locules, 19–27 ×
5–6 μm; terminal locules ±elongate; walls finely ornamented. Conidia not seen.. CHEMISTRY: Thallus and apothecia K+ purple; thallus containing fragilin (minor), parietin (minor), 7-chloroemodin (minor), 7-chloroparietinic acid (minor), ±fragilin bisanthrone (trace); apothecia containing fragilin (major), parietin (minor), 7-chloroemodin (minor), 7-chloroparietinic acid (minor), ±emodin (trace), ±7-chlorofallacinal (trace), ±7-chlorotelo-schistin (trace), ±fragilin bisanthrone (trace). |
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| Rare on bark in north-eastern Qld; a pantropical-subtropical species that is common in Africa, Asia, and Central and South America. | ||
| Elix (2009k) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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