Arthonia calcicola Nyl.

Arthonia calcicola Nyl.

Bot. Not.: 162, 1853.

Synonyms: Allarthonia calcicola (Nyl.) Redinger

Distribution: N - VG (TSB 10023), Ven (Nascimbene & al. 2021), TAA, Emil (Fariselli & al. 2020). C - Tosc, Marc (Nimis & Tretiach 1999), Umb (Nimis & Tretiach 1999, Ravera & al. 2006, Panfili 2007), Laz (Nimis & Tretiach 2004), Abr (Tretiach 2015b, Gheza & al. 2021). S - Camp (Aprile & al. 2003b, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Si (Caniglia & Grillo 2005, 2006).

Description: Thallus crustose, endosubstratic or (rarely) very thinly episubstratic, mostly not evident, when episubstratic forming a very thin, interrupted, grey-white crust. Apothecia arthonioid, emarginate, black, epruinose, round to irregular in outline, up to 0.2 mm across, scattered or confluent in clusters of 2-3, flat to slightly convex, located in shallow depressions of the rock. Proper exciple not developed; epithecium greenish black; hymenium colourless or pale yellow, (35-)45-60(-80) µm high; hypothecium brown-black. Asci 8-spored, broadly clavate, semi-fissitunicate, with a large apical dome and a distinct ocular chamber, Arthonia-type. Ascospores 1-septate, hyaline, slightly clavate, 8-16 x 3-6 µm, pointed at one end, broadly rounded at the other. Photobiont absent or chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: an early coloniser on exposed calcareous rocks below the subalpine belt; overlooked and probably more common, especially in the eu-mediterranean belt. It also occurs in warm-dry Alpine valleys.

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

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: very rare

Padanian area: extremely rare

Humid submediterranean belt: rare

Humid mediterranean belt: rather common

Dry mediterranean belt: rather rare

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

Pier Luigi Nimis - CC BY-SA 4.0

TSB 23487

Pier Luigi Nimis - CC BY-SA 4.0

TSB 23487

Pier Luigi Nimis - CC BY-SA 4.0

TSB 23487

Redinger, K. (1938) Arthoniaceae, Graphidaceae . In Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. Band 9, 2 Abt., Part 1 (G. L. Rabenhorst, ed.): 181–404. Leipzig: Borntraeger

As Allarthonia lapidicola

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Juri Nascimbene CC BY-SA 4.0

Italy, Veneto, BL, Vette Feltrine

Courtesy Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_calcicola.htm

France, sur rocher calcaire, Beaumont, alt. 508 m - Haute-Loire - (43) - leg. Jacques-Henri Leprince, det. D. et O. Gonnet, conf. C. Roux
4/3/2018

Courtesy Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_calcicola.htm

France, sur rocher calcaire, Beaumont, alt. 508 m - Haute-Loire - (43) - leg. Jacques-Henri Leprince, det. D. et O. Gonnet, conf. C. Roux
4/3/2018

Courtesy Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_calcicola.htm

France, sur rocher calcaire, Beaumont, alt. 508 m - Haute-Loire - (43) - leg. Jacques-Henri Leprince, det. D. et O. Gonnet, conf. C. Roux
4/3/2018

Courtesy Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_calcicola.htm

France, sur rocher calcaire, Beaumont, alt. 508 m - Haute-Loire - (43) - leg. Jacques-Henri Leprince, det. D. et O. Gonnet, conf. C. Roux
4/3/2018

Courtesy Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Textes_A3/Arthonia_calcicola.htm

France, sur rocher calcaire, Beaumont, alt. 508 m - Haute-Loire - (43) - leg. Jacques-Henri Leprince, det. D. et O. Gonnet, conf. C. Roux
4/3/2018

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