ITALIC 8.0

Opegrapha rotunda Hafellner

Herzogia, 10: 14, 1994.

Synonyms:

Distribution: S - Bas (Brackel 2011, 2016), Si (Brackel 2008b, 2016).

Description: Thallus inapparent, not lichenized, the hyphae developing inside the thalli of Physconia-species. Apothecia black, epruinose, more or less round, 0.5-1 mm across, with a flat, rough disc, and a somewhat prominent margin, often developing in apical and marginal parts of lobes of the host thallus. Proper exciple dark brown, the marginal hyphae radially arranged; epithecium brown, poorly differentiated from the hymenium; hymenium colourless, c. 100 µm high (incl. epithecium), I+ blue then orange-red, K/I+ blue; paraphysoids branched and anastomosing, the apical cells enlarged, with brown hyphal walls, embedded in a brownish gel. Asci (4-)8-spored, broadly cylindrical to somewhat clavate, fissitunicate, without a K/I+ blue ring-structure in tholus. Ascospores 3-septate, hyaline, somewhat clavate, with unequal cells 18-22 x 5-6 μm, with a thin gelatinous perispore. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: this rare species is known only from a single host, Physconia distorta.

Growth form: Lichenicolous fungus

Substrata: bark

Reproductive strategy: mainly sexual

paras Physconia distorta

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

Dry mediterranean belt: very 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

Source: http://fungi.myspecies.info/all-fungi/opegrapha-rotunda - CC BY-NC