Tetramelas papillatus (Sommerf.) Kalb

in Döbbeler & Rambold, Bibl. Lichenol, 88: 323, 2004. Basionym: Lecidea papillata Sommerf. - Suppl. Fl. Lapp.: 154, 1826.
Synonyms: Buellia papillata (Sommerf.) Tuck.; Buellia parasema var. papillata (Sommerf.) Th. Fr.
Distribution: N - Frl, Lomb, Piem (Isocrono & al. 2004), Lig (TSB 33479).
Description: Thallus crustose, episubstratic, rather thick, white to whitish grey, of convex to bullate, contiguous areoles, without a distinct prothallus. Apothecia lecideine, black, 0.5-1(-1.3) mm across, broadly sessile, discrete to confluent, usually abundant, with a flat to strongly convex, rarely initially pruinose disc, and a thin, soon excluded proper margin, when young often with an ephemeral thalline rim. Proper exciple dark-pigmented throughout; hymenium colourless, rarely inspersed with oil droplets, I+ blue; paraphyses branched in upper part, the apical cell swollen, with a brown cap; hypothecium dark brown. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 1-septate, brown, ellipsoid, often slightly curved, 15-25 x 7-10 µm, Buellia-type, the wall uniformly thickened, finely warted. Photobiont chlorococcoid. Spot tests: thallus K+ pale yellow, C-, KC-, P- or P+ pale yellow, UV-. Chemistry: atranorin.
Note: an arctic-alpine lichen found on terricolous bryophytes, mostly above treeline, reaching the nival belt in the Alps; it is related to T. insignis.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: extremely rare
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF


P.L. Nimis CC BY-SA 4.0
TSB 2463



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (2463)
2001/11/22


Source: https://nhm2.uio.no/typephotos/lichens/arkiv/O-L-001269d.jpg
NORWAY, NORDLAND, SALTDAL: Saltd., Ravnflauet, 1822.06.00, Sommerfelt, S.C. HOLOTYPE£