Athallia saxifragarum (Poelt) Arup, Frödén & Søchting

in Arup & al., Nord. J. Bot., 31: 36, 2013. Basionym: Caloplaca saxifragarum Poelt - Feddes Rep., 58: 176, 1955.
Synonyms: Callopisma luteoalbum f. microcarpum (Anzi) Arnold; Caloplaca pyracea var. microcarpa (Anzi) Dalla Torre & Sarnth.; Caloplaca schoeferi Poelt; Placodium luteoalbum f. microcarpum Anzi
Distribution: N - Frl, Ven (Nascimbene 2002, 2008c), TAA (Nascimbene & al. 2006, Nascimbene 2008b), Lomb (Dalle Vedove & al. 2004), Piem (Isocrono & al. 2004), VA (Piervittori & al. 2004). C - Marc (Nimis & Tretiach 1999), Abr (Nimis & Tretiach 1999), Umb (Ravera & Di Toma 2003, Ravera & al. 2006), Abr (Gheza & al. 2021). S - Cal (Ravera & al. 2016).
Description: Thallus crustose, usually thin and continuous, sometimes almost endosubsratic, pale grey to almost white, very rarely yellowish white, forming 0.5-2 cm wide patches. Cortex usually poorly developed, of an amorphous layer or indistinctly paraplectenchymatous; medulla poorly developed. Apothecia frequent, zeorine, scattered to crowded, adnate to sessile, 0.3-1 mm across, with a flat to slightly convex, orange to yellow-orange disc, a thick, yellow-orange (often paler than disc) proper margin of irregularly radiating, thick-walled hyphae, and a poorly developed, greyish to yellowish grey thalline margin. Epithecium orange, granular, K+ red; hymenium colourless, 70-90(-100) μm tall, amyloid; paraphyses (1-)2-2.5 μm thick at base, the uppermost cells (2-)4–6 μm wide; hypothecium colourless, sometimes inspersed with oil droplets. Asci 8-spored, cylindrical-clavate, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, ellipsoid to broadly ellipsoid, (8.5-)10-15 x (4.5-)6-8(-10) μm, the septum (3-)4-5.5(-7.5) μm thick, ratio of septum/spore length (0.26-)0.30-0.45(-0.50). Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ red. Chemistry: thallus without lichen substances; apothecia with parietin (major), fallacinal, emodin, teloschistin and parietinic acid (minor), corresponding with chemosyndrome A of Søchting (1997).
Note: a circumpolar, arctic-alpine lichen found on plant debris (especially on dead leaves of Saxifraga, Dryas and Carex firma), and on muribund bryophytes in open habitats over calcareous or dolomitic substrata, most common above treeline and reaching the highest mountains of southern Italy. On the synonymisation of Caloplaca schoeferi see Vondrák & al. (2016).
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: common
Subalpine belt: very common
Oromediterranean belt: very rare
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:

(info)

1

2

3

4

5

Solar irradiation:

(info)

1

2

3

4

5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

1

2

3

Altitudinal distribution:

(info)

1

2

3

4

5




Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34510)
2002/01/16



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33997)
2001/12/07


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030015236076], Austria, Stiria, Hochschwab montium Alpium, Knappensteig, Polster, 1800 m. Ad plantas emortuas in rupibus. Leg. et det. A. Vezda, 19.09.1982.


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot


Felix Schumm - CC BY-SA 4.0
[BR5030036237564], Iceland,O-Island, Egilstadir, on Salix wood, 27.07.1980, det. A. Aptroot



Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007



Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007



Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007



Pier Luigi Nimis CC BY-SA 4.0
TSB 42463



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37184



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37184



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37184



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37184



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37184