ITALIC 7.0

Arthonia subfuscicola (Linds.) Triebel

Mycotaxon, 42: 268, 1991. Basionym: Microthelia subfuscicola Linds. - Quart. J. Microsc. Sci., N.S., 11: 39, 1871.

Synonyms: Arthonia glaucomaria var. pallidae Rehm ex Almq.; Celidium varians var. pallidae Rehm nom.nud.

Distribution: N - Lomb (Anzi 1860, Brackel 2008c, 2015, 2016), Piem (Brackel 2015, 2016). C - Laz (Brackel 2015, 2016), Abr (Brackel 2015, 2016), Sar (Brackel & Berger 2019). S - Pugl (Brackel 2015, 2016), Si (Brackel 2008c, 2015, 2016).

Description: Thallus endosubstratic, not evident and not lichenized, developing inside the apothecia, rarely the thallus, of epiphytic Lecanora-species. Apothecia arthonioid, to 0.25 mm across, forming dark spots, round to irregular in outline, with a black, epruinose, flat to slightly convex disc, without a distinct proper margin. Proper exciple poorly developed; epithecium greenish brown, 10-15 µm high; hymenium colourless, 40-55 µm high, I+ red; paraphysoids c. 2 µm thick at mid-level, the uppermost cells usually slightly swollen; hypothecium brown, up to 25 µm high. Asci 8-spored, broadly clavate to subglobose, semi-fissitunicate, with a large apical dome and a distinct ocular chamber, Arthonia-type. Ascospores 3-septate, hyaline to pale brown, narrowly ovoid, 14-17.5 x 5-7 µm, with a thin gelatinous epispore reacting I+ red, K/I+ blue. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: this widespread lichenicolous fungus causes dark spots on the whitish apothecia of Glaucomaria carpinea, Lecanora chlarotera and L. albella.

Growth form: Lichenicolous fungus

Substrata: bark

Reproductive strategy: mainly sexual

paras Lecanora spp.

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: rare

Padanian area: extremely rare

Humid submediterranean belt: rare

Humid mediterranean belt: rare

Dry mediterranean belt: 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

Index Fungorum GBIF

Paul Cannon - Source: http://fungi.myspecies.info/taxonomy/term/8415/media; Owner: CC BY-NC

Paul Cannon - Source: http://fungi.myspecies.info/taxonomy/term/8415/media; Owner: CC BY-NC

Paul Cannon - Source: http://fungi.myspecies.info/taxonomy/term/8415/media; Owner: CC BY-NC