ITALIC 8.0

Arthonia epiphyscia Nyl.

Flora, 58: 361, 1875.

Synonyms: Bryostigma epiphyscium (Nyl.) S.Y. Kondr. & Hur; Conida epiphyscia (Nyl.) Zopf

Distribution: N - VG, TAA (Ravera & al. 2023b). C - Tosc (Tretiach & al. 2008, Brackel 2016), Abr (Brackel 2015, 2016), Sar (Brackel & Berger 2019). S - Camp (Brackel 2021), Cal (Brackel 2016)

Description: Thallus inapparent, not lichenized, with hyaline vegetative hyphae immersed in the thallus of species of the Physcia adscendens-group. Apothecia arthonioid, round, single or fusing into small groups, developing superficially, 0.1-0.3(-0.4) mm across, with a black, convex, smooth to rough disc, without a distinct margin. Proper exciple poorly developed: epithecium olivaceous brown, 10-15 µm high, K+ olive green; hymenium colourless to pale brown, 30-35(-45) µm high, I+ red, K/I+ blue; paraphysoids c. 2 µm thick, the apical cells to 4 µm wide; hypothecium dark reddish brown, 50-70 µm high, with pigments in intercellular spaces, K+ pale green. Asci 8-spored, broadly clavate, semi-fissitunicate, with a large apical dome, a distinct ocular chamber, and a K/I+ blue ring-structure in tholus, Arthonia-type. Ascospores 1-septate, hyaline, oblong to clavate with an attenuated lower cell, (9-)10-13(-14) x (3-)3.5-5 µm, without a distinct perispore. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: commensalistic or parasitic on Physciaceae, this non-lichenised fungus was certainly overlooked and might be more widespread, but is certainly not common in Italy.

Growth form: Lichenicolous fungus

Substrata: bark

Reproductive strategy: mainly sexual

paras Physciaceae

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: rare

Padanian area: extremely rare

Humid submediterranean belt: extremely rare

Humid mediterranean belt: extremely rare

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 35102

Photo uploaded by P. Cannon, CC BY-SA NC Source: http://fungi.myspecies.info/file/12736