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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
Letrouitia domingensis (Pers.) Hafellner & Bellem.

Nova Hedwigia 35: 281 (1982)

Patellaria domingensis Pers., Ann. Wetterauischen Ges. Gesammte Naturk. 2: 12 (1811).

T: Lydenburg, Transvaal, South Africa, F.Wilms 16, comm. Dr Lahm 1885; holo: G n.v.; iso: S, UPS, W n.v. [distributed as Lojka, Lichenoth. Univ. No. 95].

  Thallus pale yellow, greenish yellow to yellow-orange, effuse, occasionally smooth, usually verrucose; soredia and isidia absent. Apothecia common, scattered, ±rounded or somewhat distorted, sessile, constricted at the base, 0.5–2.0 mm wide; disc red-brown, brown-black to black, concave, plane or convex; margin prominent, yellow-orange to orange, elevated above the disc, becoming partially excluded in older black apothecia; disc and margin K+ purple; proper exciple of radiating agglutinated hyphae, the outer layer encrusted with anthraquinone crystals, colourless within and lacking crystals, containing scattered algal cells near the base of the apothecium. Epihymenium red-brown, encrusted with golden yellow or orange anthraquinone crystals or the crystals eroded. Hymenium not inspersed, colourless, 90–115 μm thick; hypothecium yellow to pale brown. Asci 8-spored, very rarely with 6 ascospores, 60–90 × 16–22 μm. Ascospores ellipsoidal, straight to slightly curved, transversely septate, with 6–10 lens-shaped locules, 25–48 × 8–16 μm. Conidia short-bacilliform, c. 3 × 1 μm.
CHEMISTRY: Thallus and apothecia K+ purple; both containing fragilin (major), parietin (minor), ±emodin (trace), ±7-chloroemodin (trace), ±7-chlorofallacinal (trace), ±7-chloroteloschistin (trace), ±7-chloroparietinic acid (trace), ±physcoin bisanthrone (trace), ±fragilin bisanthrone (trace).
  Known from eastern Qld and N.S.W.; common on bark in rainforest or wet-sclerophyll forest. A pantropical-subtropical species in eastern and southern Asia, Africa, North, Central and South America, New Caledonia, Fiji and the Hawaiian Islands.  
  Elix (2009k)  

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

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