Arthonia subvarians Nyl.
Flora, 51: 345, 1868
Synonyms: Arthonia galactinaria Leight.
Description: Thallus inapparent, not lichenized, forming discoloured patches on the apothecia of Polyozosia-species. Apothecia arthonioid, black, epruinose, convex and cushion-like, irregularly rounded, 0.1-0.2 mm across. Proper exciple very poorly developed; epithecium brown, K-, I+ rust-red, K/I+ blue; hymenium colourless, I+ red, K/I+ blue; paraphysoids branched and anastomosing, the apical cells swollen; hypothecium colourless. Asci (4-)8-spored, broadly clavate, semi-fissitunicate, with a large apical dome and a distinct ocular chamber, Arthonia-type. Ascospores 1-septate, with a cell wider and longer than the other, not or only slightly constricted at septum, at first hyaline but soon turning pale brown, soleiform, 9-13 x 4-5 μm, smooth-walled. Photobiont absent. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Polyozosia spp.
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: rare
Dry submediterranean belt: rare
Humid submediterranean belt: rare
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
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35696)
2003/01/21
in the apothecia of the host, Lecanora flotowiana
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Source: Hafellner J, Grube M. Arthonia epipolytropa and Arthonia subclemens, two new lichenicolous species on Lecanora polytropa, with a key to the microfungi known on this common species. The Lichenologist. 2023;55(5):241-251. doi:10.1017/S0024282923000397 - CC BY 4.0
Arthonia subvarians (Hafellner 73605); habitus Scale: 0.5 mm.
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Polyozosia spp.
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: rare
Dry submediterranean belt: rare
Humid submediterranean belt: rare
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
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35696)
2003/01/21
in the apothecia of the host, Lecanora flotowiana
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Source: Hafellner J, Grube M. Arthonia epipolytropa and Arthonia subclemens, two new lichenicolous species on Lecanora polytropa, with a key to the microfungi known on this common species. The Lichenologist. 2023;55(5):241-251. doi:10.1017/S0024282923000397 - CC BY 4.0
Arthonia subvarians (Hafellner 73605); habitus Scale: 0.5 mm.
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_galactinaria.htm
France, Chalet de Laval, Névache, 2024 m - Hautes-Alpes
4/6/2017
