Miriquidica pulvinatula (Arnold) Hertel & Rambold

Mitt. bot. Staatss. München, 23: 389, 1987. Basionym: Lecidella pulvinatula Arnold - Verh. zool.-bot. Ges. Wien, 29: 382, 1879.
Synonyms: Lecidea circumnigrata H. Magn.; Lecidea pulvinatula (Arnold) Dalla Torre & Sarnth.
Distribution: N - TAA.
Description: Thallus crustose, episubstratic, dirty white, pale grey or beige, thin, rimose-areolate, forming small, up to 1 cm wide patches, the areoles small, up to 0.5 mm wide, flat, developing on a black hypothallus. Medulla white, I-. Apothecia lecideine, small, 0.3-0.5 mm across, broadly adnate to sessile, constricted at base, with a black disc and a slightly paler proper margin. Proper exciple blue-green in outer part, the hyphae somewhat cellular-radiate, colourless within; epithecium greenish black; hymenium colourless, 40-50(-55) μm high, I+ dark blue; paraphyses coherent, mostly simple, c. 2 μm thick at mid-level, the apical cells slightly swollen; hypothecium colourless, I+ blue. Asci 8-spored, broadly cylindrical to subclavate, more or less of the Lecanora-type, but with a weakly defined apical cushion and ocular chamber. Ascospores 1-celled, hyaline, ellipsoid, 8-13 x (3-)4.5-5 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: miriquidic acid.
Note: on iron-rich crystalline rocks near and above treeline; closely related to M. leucophaea.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Species of metal-rich rocks

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

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC