Acarospora admissa (Nyl.) Kullh.
Not. Sällsk. Fauna Fl. Fenn. Förh., Ny Ser. ,11: 272, 1871 (1870). Basionym: Lecanora admissa Nyl. - Flora, 50: 370, 1867
Synonyms: Acarospora discreta (Ach.) Th.Fr.; Acarospora durietzii H.Magn.
Description: Thallus crustose, episubstratic, areolate, pale chestnut brown to dark brown or black, the areoles of various colours, often pale brown and the margin of elevated apothecia dark brown (or vice-versa), sometimes shiny, usually smooth but occasionally rugulose, forming up to 5 cm wide patches. Areoles flat to convex, usually dispersed, sometimes clustered, 0.2-1.5 mm wide, 300-600 μm thick, broadly attached. Epicortex 10-20(-40) μm thick; cortex 25-45(-60) μm thick, of 3-5 μm wide, round to irregularly shaped cells; algal layer 50-100 μm thick, continuous; medulla 100-400 μm thick, of thin-walled, 2-4 μm thick, intricate hyphae. Apothecia 1-5 per areole, 0.2-1 mm across, at first immersed and punctiform, later becoming elevated and with an expanded, rough, sometimes umbonate, dark brown, epruinose disc, the margin formed from the parathecium (sometimes with some algae) with a thin thalline remnant around the base of elevated apothecia. Proper exciple 20-40 μm thick in immersed apothecia, expanding to 50-100 μm in elevated apothecia, IKI-; epithecium brownish, c. 10 μm high; hymenium colourless, 90-120 μm high, the hymenial gel hemiamyloid, K/I+ light blue fading to light red; paraphyses coherent, (1-)1.5(-2) μm thick at mid-level, the apical cells up to 4 μm wide; subhymenium 10-35 μm high, IKI+ blue; hypothecium 10-30 μm high. Asci 100-200-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, narrowly ellipsoid, 3-4(-5) x (1-)1.5(-2.5) μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: very rare
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
J. Kocourková
Lectotype of Lecanora admissa Nyl., leg. J. P. Norrlin (H-Nyl 27455). - Bar: 1 mm
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: very rare
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
