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Lepraria granulata Š. Slavíková |
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Nomenclatural data
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Lichenologist 39(4): 321 (2007); type: Bulgaria, Rila Mts, Rila National Park, 42°12'1.7"N, 23°19'27.7"E, 23 June 2004, Š. Bayerová 3243 & M. Slavík (PRA—holotypus; BG—isotypus; GenBank accession no. DQ914539).
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Morphology
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Thallus crustose, leprose, with granular appearance; white, whitish grey to grey, sometimes with faint bluish grey tinge, granules below the upper surface sometimes creamy; relatively soft, hyphae quite loosely packed, firmly attached to the substrate; margin delimited to diffuse, lobes sometimes present, obscure; cortex absent; medulla absent; hypothallus usually scarce, whitish grey, grey to blackish grey, occasionally pale yellowish orange-brown, lower surface absent; areoles absent; squamules absent; soredia abundant, coarse, up to 0.2(-0.3) mm in diam.; projecting hyphae usually absent; isidia-like structures absent.
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Chemistry
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Atranorin ±, "granulata unknown 1", "granulata unknown 2" ±, unidentified anthraquinones ± (hyphae below thallus only). K+ yellowish, coloured hyphae below thallus K+ purple-red, other hyphae below thallus K–, C–, Pd– or + faint yellowish. The diagnostic feature of this recent species is the production of two unknown fatty acids, "granulata unknown 1 & 2", for TLC characteristics see Slavíková-Bayerová & Fehrer (2007).
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Remarks
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According to molecular studies, L. granulata belongs to a monophyletic group together with L. alpina, L. atlantica, L. borealis, L. caesioalba, L. elobata, L. humida and L. neglecta (Ekman & Tønsberg 2002, Slavíková-Bayerová & Fehrer 2007). Slavíková-Bayerová & Fehrer (2007) additionally described L. sp. G that is chemically identical to L. granulata, and also is very close to that species by means of ITS sequence, but morphologically is more similar to L. humida than to L. granulata. Morphologically similar species include L. alpina, L. caesioalba, L. neglecta and especially L. borealis, but L. granulata is chemically distinct by producing unknown fatty acids "granulata unknown 1" and "granulata unknown 2".
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Ecology and distribution
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Substrate and ecology: mainly on moss on siliceous rock, sometimes on soil. Distribution: so far known from Central and Eastern Europe.
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