Athallia saxifragarum (Poelt) Arup, Frödén & Søchting

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, 2022, Nascimbene 2008b), Lomb (Dalle Vedove & al. 2004), Piem (Isocrono & al. 2004), VA (Piervittori & al. 2004). C - Marc (Nimis & Tretiach 1999), Abr (Nimis & Tretiach 1999, Di Nuzzo & al. 2021, Vallese & al. 2022), 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 endosubstratic, 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, bright orange to yellow-orange disc, a thick, yellow-orange (often paler than disc) proper margin, and a poorly developed, greyish to yellowish grey thalline margin. Proper exciple of irregularly radiating, thick-walled hyphae; epithecium orange, granular, K+ red; hymenium colourless, 70-90(-100) μm high, amyloid; paraphyses (1-)2-2.5 μm thick at base, the apical cells (2-)4–6 μm wide; hypothecium colourless, sometimes inspersed with oil droplets. Asci 8-spored, cylindrical-clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 2-celled, polarilocular, hyaline, ellipsoid to broadly ellipsoid, (8.5-)10-15 x (4.5-)6-8(-10) μm, the equatorial thickening (“septum”) (3-)4-5.5(-7.5) μm, 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 moribund 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:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

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

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A4/Athallia_saxifragarum.htm

France, Névache, Chapelle St-Benoît, alt. 1630 m - Hautes-Alpes
23/01/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A4/Athallia_saxifragarum.htm

France, Névache, Chapelle St-Benoît, alt. 1630 m - Hautes-Alpes
23/01/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A4/Athallia_saxifragarum.htm

France, Névache, Chapelle St-Benoît, alt. 1630 m - Hautes-Alpes
23/01/2017

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