Acarospora modenensis H. Magn.
K. Svenska Vetensk.-Akad. Handl., ser. 3, 7, 4: 259, 1929.
Synonyms: Acarospora engadinensis H. Magn.?
Description: Thallus crustose, episubstratic, areolate but often reduced to the thalline margin of apothecia, the areoles 0.3-1 mm wide, 0.3-0.4 mm thick, chestnut brown, often blackened at margins, dispersed or clustered, sometimes arranged in lines along cracks in the rock; lower surface whitish. Epinecral layer present, 5-15 µm thick; cortex paraplectenchymatous 20-40(-70) µm thick, underlain by a rather discontinuous, but not toothed algal layer. Apothecia lecanorine, 0.2-0.7 mm across, usually 1 (rarely 2-4) per areole, occupying most of its surface, with a dark brown (darker than thallus), concave, sometimes umbonate disc, and an evident thalline margin of variable thickness. Epithecium brown; hymenium colourless, 60-90 µm high; paraphyses (1.5-)2-3 µm thick at base, the apical cells 3-5 µm wide; hypothecium colourless. Asci 100-200-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, ellipsoid (3-)4-6 x 1.5-2.5 µm. Photobiont chlorococcoid. Spot tests: 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: rare
Humid submediterranean belt: rare
Padanian area: very rare
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
P.L. Nimis CC BY-SA 04
TSB 20084
Magnusson A. H. (1935) Acarosporaceae, Thelocarpaceae. - In: Rabenhorst G. L.: Kryptogamen-Flora von Deutschland, Österreich, und der Schweiz-. 2nd- IX. Die Flechten. Abt. 5- 1. Gebr. Borntraeger. Leipzig, pp. 1-318. – Public Domain
P.L. Nimis CC BY-SA 4.0
TSB 29084
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: rare
Humid submediterranean belt: rare
Padanian area: very rare
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
P.L. Nimis CC BY-SA 04
TSB 20084
Magnusson A. H. (1935) Acarosporaceae, Thelocarpaceae. - In: Rabenhorst G. L.: Kryptogamen-Flora von Deutschland, Österreich, und der Schweiz-. 2nd- IX. Die Flechten. Abt. 5- 1. Gebr. Borntraeger. Leipzig, pp. 1-318. – Public Domain
