Rinodina mniaroea (Ach.) Körb.

Syst. Lich. Germ.: 126, 1855. Basionym: Lecanora mniaroea Ach. - Syn. Meth. Lich.: 339, 1814.
Synonyms: Pachysporaria mniaraea (Ach.) M. Choisy; Rinodina mniaraea (Ach.) Körb.; Rinodina mniaraea f. amniocola (Ach.) Arnold; Rinodina mniaraea var. normalis Th. Fr.
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Nimis 1994), TAA (Bilovitz & al. 2014, 2014b, Obermayer 2020, Nascimbene & al. 2022), Lomb, Piem (Isocrono & al. 2004), VA. C - Mol (Nimis & Tretiach 2004, Caporale & al. 2008).
Description: Thallus crustose, episubstratic, more or less continuous to verrucose, ochraceous to reddish brown, rugose, without a distinct prothallus. Medulla white, without crystals. Apothecia lecanorine, 0.7-1.5 mm across, usually crowded, adnate to sessile, with a dark brown to black-brown, sometimes pruinose, flat to convex disc, and a thin, entire, prominent, usually persistent thalline margin. Thalline exciple 70-100 μm wide laterally, indistinctly corticate, overlain by an epinecral layer; epithecium brownish orange; hymenium colourless, 80-170 μm high; hypothecium colourless to pale brown, 80-250 μm high, inspersed with oil droplets, especially in older apothecia. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, 20-35 x 9-15 μm, Physcia-type, with a well-developed torus and smooth walls, and with an ontogeny of type A (apical wall thickening after septum formation). Pycnidia immersed. Conidia bacilliform, 4-5 μm long. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: with variable amounts of variolaric acid and unidentified terpenoid.
Note: an arctic-alpine, circumpolar species found on soil, mosses, and plant debris in tundra-like environments, mainly over subacid substrata, reaching the nival belt in the Alps.
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 common
Subalpine belt: rather common
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 16444



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9923)
2001/11/29



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9923)
2001/11/29



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16443)
2001/11/29