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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
Xanthoparmelia microcephala Elix & Kantvilas
  Mycotaxon 73: 445 (1999). T: Tasmania: Little Swanport River, ca. 4 km west of bridge on Tasman Highway, 42°20'S, 147°53'E, 10 m, on dolerite boulder along river bank in dry sclerophyll forest, G. Kantvilas 37/93, 17 May 1993; holo: HO.  
  Thallus foliose, adnate to loosely adnate, to 10 cm wide.   Lobes  imbricate, ±congested, flat, subirregular to sublinear, subirregularly to subdichotomously branched, 0.8-1.5 mm wide.  Upper surface yellow-green or darkening with age, shiny, emaculate, smooth at margins, becoming rugose in the centre, lobe margins blackened; without soredia but isidiate; isidia laminal and ±marginal, cylindrical, short, slender, 0.02-0.05 mm wide, not inflated, becoming coralloid, apices syncorticate, pale or darkening.  Medulla white.  Lower suface shiny, pale tan to brown, darker at apices; rhizines sparse to moderately dense, simple, concolorous.  Apothecia sessile to substipitate, 3-8 mm wide; disc concave, shiny, red-brown to dark brown; thalline exciple smooth, shiny, isidiate, margin entire, rather thin, often disappearing in mature apothecia.  Ascospores ellipsoid, 8-10 x 4-6 µm.  Pycnidia rare, immersed.  Conidia bifusiform, 5-6 x 1 µm. CHEMISTRY: Cortex K-;  medulla K+ yellow becoming red, C-, KC-, P+ orange;  containing usnic acid, salazinic acid (major), consalazinic acid (minor), norstictic acid (trace), protocetraric acid (trace), protoconstipatic acid (±) and constipatic acid (±).
  This new species is quite widely distributed on dead wood and rocks in temperate areas of southern and eastern Australia (W.A., S.A., Qld, N.S.W., L.H.I., A.C.T., Tas.).  
  Elix & Kantvilas (1999a)  

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

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