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Lepraria leprolomopsis Diederich & Sérus. |
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Nomenclatural data
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In Aptroot, Diederich, Sérusiaux, Sipman, Bibl. Lichenol. 64: 76 (1997); type: Papua New Guinea, Simbu prov., Mt. Wilhelm area, 9. Aug. 1992, H. Sipman 35901 (B—holotypus; LG, herb. Diederich—isotypi).
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Morphology
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Thallus crustose, leprose, with powdery to cottony appearance; yellowish white; thick, relatively soft, weakly attached to the substrate; shape more or less continuous, up to few dm in diam.; margin delimited, sometimes almost diffuse, lobes absent; cortex absent; medulla present, distinct, white; hypothallus usually present, poorly developed, white, lower surface present, continuous, even, white, not or poorly tomentose; areoles absent; squamules absent; soredia abundant, mostly medium sized, 75-125 µm in diam.; wall usually poorly developed; projecting hyphae sometimes present; consoredia often present, 150-300 µm; isidia-like structures absent. Photobiont green, coccoid, cells 13-15 µm in diam.
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Chemistry
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Atranorin, stictic, constictic, cryptostictic, norstictic and connorstictic acids, unknown terpenoid. K+ yellow, C–, KC–, Pd+ orange.
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Remarks
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Several species can produce stictic acid complex and atranorin, see the discussion under L. caesioalba. Morphologically, L. diffusa, L. eburnea, L. lobificans L. nivalis, L. nylanderiana and L. vouauxii may be similar to L. leprolomopsis, but are separable by diagnostic substances, except L. nivalis in some cases (see the discussion under L. nivalis). L. diffusa contains 4-oxypannaric acid 2-methylester; L. eburnea alectorialic acid, L. nylanderiana thamnolic acid; L. vouauxii pannaric acid 6-methylester and L. lobificans zeorin (in addition to the stictic acid complex).
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Ecology and distribution
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Substrate and ecology: bark, mosses on bark. Distribution: New Guinea.
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