ITALIC 8.0

Arthonia granitophila Th. Fr.

Bot. Notiser: 39, 1865.

Synonyms: Melaspilea granitophila (Th. Fr.) Coppins; Melaspilea subarenacea J. Nowak & Kiszka

Distribution:

Description: Thallus crustose, poorly developed, consisting of grey, brownish or rusty orange granules scattered around the apothecia. Apothecia black, epruinose, adnate to sessile, round to short-ellipsoid, rarely almost lirelliform and then sometimes curved, up to 0.4 mm wide, with a concave to flat disc and a poorly evident proper margin. Proper exciple black, carbonized, extending below the hymenium; epithecium brown-black, granulose, K-; hymenium colourless to pale brown, 40-50 µm high, I+ blue; paraphysoids branched and anastomosing, thread-like, the apical cells not markedly swollen; hypothecium dark brown to brown-black, continuous with the exciple, up to 40 µm high. Asci 8-spored, clavate to pyriform, semi-fissitunicate, with an internal apical beak, 25-45 x 14-20 µm. Ascospores 1-septate, with subequal cells, at first hyaline then pale brown and warted, ovoid-oblong to sole-shaped, 10-16(-19) x (3.5-)4-6(-6.5) µm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on steeply inclined to rain-sheltered surfaces of acid siliceous rocks, with optimum in the montane and subalpine belts. Not reported from Italy, but known from several localities in the Eastern Alps (Austria), including Carinthia and Tyrol. To be looked for in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

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

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3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

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

France, Belvédère-Campomoro - Corse - (20) - dét. confirmée par Claude Roux
1/10/2017

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

France, Belvédère-Campomoro - Corse - (20) - dét. confirmée par Claude Roux
1/10/2017

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

France, Belvédère-Campomoro - Corse - (20) - dét. confirmée par Claude Roux
1/10/2017

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

France, Belvédère-Campomoro - Corse - (20) - dét. confirmée par Claude Roux
1/10/2017

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

Central Europe: Germany. (Coll/ident: D. Teuber). On siliceous rocks