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Lepraria ecorticata (J.R. Laundon) Kukwa |
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Nomenclatural data
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Mycotaxon 97: 64 (2006); type: United Kingdom, England, Devon, Ilfracombe, Torrs Walks, 1. Sept. 1971, J. R. Laundon 2851 (BM—holotypus). Lecanora ecorticata J.R. Laundon, Nova Hedwigia 76: 100 (2003).
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Morphology
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Thallus crustose, leprose, with powdery appearance; greyish green to greenish grey, often with yellowish tinge; usually thick, firmly attached to the substrate; shape usually irregular, thallus diameter can be extensive; margin diffuse, lobes absent; cortex absent; medulla rarely present in places, weakly developed; prothallus absent; areoles sometimes present on thick specimens; squamules absent; thallus surfaces without soredia absent, soredia abundant, mostly fine to medium, 10-100 µm in diam.; soredia well separated from each-other; isidia-like structures absent. Photobiont chlorococcoid, up to 15 µm in diam.
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Chemistry
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Usnic acid, zeorin, atranorin ± (in variable amounts), unidentified terpenoids ±; Laundon (2003) reported that rarely zeorin can be missing and/or unidentified fatty acids present; Flakus and Kukwa detected porphyrilic acid in few specimens. K± faint yellow, C–, KC–, Pd–.
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Remarks
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Chemically similar taxa include L. coriensis, L. straminea, L. texta, L. usnica and L. leuckertiana which produce usnic acid and usually zeorin, but differ in following aspects. L. coriensis and L. usnica have lobes and medulla. L. straminea has corticate granules. L. leuckertiana has cottony appearance with well developed medulla and the soredia are not well separated from one another. Some soredia of L. texta are also not well separated, that species also can develop a hypothallus. Usually the appearances of L. texta and L. ecorticata are different.
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Ecology and distribution
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Substrate and ecology: siliceous rock, mosses on rock, sometimes lichens; mostly shaded and sheltered places. Distribution: Europe, North America, South America, Asia (China).
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