Preliminary version 1 January 2015
Caloplaca spitsbergensis H. Magn.
Nova Hedwigia 87 (1-2): 69-96 (2008).
Basionym: Data lacking.
Synonym: Index Fungorum
Protolog: Data lacking.
Type locality: Data lacking.
Barcode: Data lacking.
Coordinates: Data lacking.
Thallus: crustose, endosubstratic, occasionally when the habitat is eutrophicated small thallus areoles develops, irregular in outline, small, evanescent to thin; margin simple, indistinct; surface grey, granulose, matt, epruinose cortex is indistinct. Algal layer of clustered to scattered cells; medulla hyaline, dense.
Apothecia moderately abundant to abundant, in loose groups or aggregations, occasionally forming raised conglomerates, 0.5-0.7(-1) mm in diam., small to large, sessile, strongly constricted, lecanorine to biatorine; disc initially plane, becoming convex to distinctly convex in old apothecia, ferruginous red to dark brown, surface structure rough, epruinose; margin initially distinct, with time indistinct, thin, persistent or becoming excluded, not to occasionally flexuose, thalline margin grey, proper margin brownish red to reddish brown, often brighter than or concolorous with disc, smooth, epruinose. Exciple to 50 µm wide, present or suppressed with very few algal cells; proper exciple narrow, prosoplectenchymatous, strongly glutinized, ± distinct, hyaline. Hypothecium of unoriented hyphae, with lumina broader and more rounded in lower part, often strongly swollen, hyaline; subhymenium hyaline. Hymenium 70 µm high, hyaline; paraphyses terminal cells simple or swollen, 3-5 µm wide, hyaline; subterminal cells to 3 µm wide; epihymenium 15 µm high, distinct, orange to red. Asci 55 x 13 µm.
Ascospores c. 8 per ascus, often poorly developed, narrowly ellipsoid, 13-15(-17) x (3.5-)5.5-6 µm; septum 3.5-4 µm (Søchting 2008: 92).
Photobiont: Data lacking.
Chemistry: 7-chloroemodin, emodin, parietin, 1-O-methyl-7-chloroemodin, 7-chloro-1,6,8-trihydroxy-3-methyl-10-anthrone, 7-chloro-citreorosein, 7-chloroemodinal (Elix et al. 2000); chemosyndrome C1. Thallus surface K-, C-; thallus cortex K-, C-; medulla K-; ascomatal disc K+ red, C+ red; epihymenium K+ red, C+ red (Søchting 2008: 92).
Ecology: On dry driftwood.
Molecular data: Genbank
Distribution: Database
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