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Lepraria celata Š. Slavíková |
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Nomenclatural data
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Lichenologist 38(6): 504 (2006); type: Ukraine, the East Carpathians, north of Rachiv (Rachov), west slope of Terentin Mt., 48°6'26.3"N, 24°12’20.4"E, 19 July 2004, Š. Bayerová 3448 (PRA— holotypus; BG, NMW—isotypi; GenBank accession no. DQ401100).
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Morphology
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Thallus crustose, leprose, with powdery appearance; grey-green to whitish green; thin to thick, relatively soft, not very firmly attached to the substrate; shape usually irregular; margin diffuse or delimited, lobes absent; cortex absent; true medulla absent but hypothallus may look like medulla; hypothallus of sparse patches of hyphae growing into cavities of substratum, hyphae below thallus usually sparse, white, lower surface absent; prothallus absent; areoles absent; squamules absent; soredia abundant, fine, (20-)35-50(-60) µm in diam., mostly convex, loosely packed; projecting hyphae rarely present, short; isidia-like structures absent. Photobiont chlorococcoid.
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Chemistry
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Atranorin ± (major to minor), roccellic/angardianic acid. K– or + faint yellowish, C–, Pd–.
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Remarks
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According to molecular studies, L. celata is close to but still different from L. jackii (Slavíková-Bayerová & Orange 2006, Fehrer et al. unpublished). Morphologically similar species include L. atlantica, L. humida, L. elobata and especially L. jackii, L. neojackii, L. toensbergiana and L. sylvicola but all these taxa can be distinguished chemically. L. celata is chemically identical to a chemotype of L. borealis (sensu Prigodina-Lukošienë et al. 2003, Kukwa 2006b, Saag et al. 2007), L. caesioalba (chemotype III sensu Tønsberg 2004), L. jackii sensu lato, and L. normandinoides (rare chemotype III sensu Lendemer & Harris 2007). L. borealis and L. caesioalba are distinct in their granular (L. neglecta type) thallus, L. normandinoides has marginal lobes and dark rhizohyphae. See also discussion under L. jackii.
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Ecology and distribution
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Substrate and ecology: terricolous – soil and debris, mosses; open habitats, often in rock cervices. Distribution: Europe (Bulgaria and Ukraine), montane; probably wider.
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