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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
Dirinaria minuta Kalb

Biblioth. Lichenol. 78: 145 (2001)

T: Keep River Natl Park, N.T., [40 km NE of Kununurra, W.A.], 15°50’S, 129°07’E, 9 Aug. 1995, K. & A.Kalb 29565; holo: CANB; iso: Herb. Kalb.

  Thallus 2–3 cm wide, tightly adnate, subdichotomously to subpinnately lobate, becoming subcrustose, verrucose and areolate in the centre. Lobes radiating, contiguous, longitudinally plicate and rugose, ±plane, 0.8–1.5 mm wide; apices rounded, discrete. Upper surface grey to yellow-grey or olive-grey, epruinose or with whitish pruina along the margins and on the surface of the lobe tips; soredia and dactyls absent. Medulla white, rarely lower medulla partly yellow-orange. Lower surface pale brown to brown-black or black. Apothecia common, sessile or constricted at the base, 0.3–0.8 mm wide; disc black, epruinose. Epihymenium brown, c. 10 μm thick. Hymenium colourless, 70–90 μm thick. Hypothecium pale yellow-brown, 30–40 μm thick, lentiform. Ascospores 12–14 × 4.5–5.5 μm. Pycnidia not seen.
CHEMISTRY: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K–, C–, KC–, P–; containing atranorin (minor), chloroatranorin (trace), sekikaic acid (major), 4’-O-demethylsekikaic acid (minor), homosekikaic acid (trace), 3β-acetoxyhopane-1β,22-diol (minor),±unknown terpenes (minor).
  Endemic; occurs on rocks in hinterland areas of the N.T.  
  Elix (2009l)  

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

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