ITALIC 8.0

Arthonia almquistii Vain.

Meddeland. Soc. Fauna Fl. Fenn., 10: 209, 1883.

Synonyms:

Distribution: C - Tosc (Brackel 2015, 2016).

Description: Thallus inapparent, not lichenized, lichenicolous on different species of saxicolous lichens, mainly Porpidiaceae and Agyriaceae. Apothecia arthonioid, emarginate, black, rounded, convex, 0.1-0.25(-0.6) mm across, immersed to erumpent, crowded and partly confluent, with a rough surface. Proper exciple poorly developed, dark brown, 8-10 μm wide; epithecium dark brown, 10-15 μm thick; hymenium colourless to pale brown, (30-)40-50 μm high; paraphysoids short-celled, strongly branched and anastomosing, 2-2.5 μm thick, the apical cells dark brown-pigmented, 3-4.5(-5.5) μm wide; hypothecium 40-70 μm high, I+ red, with a colourless to pale brown subhymenial layer and a brown to dark brown basal zone. Asci 8-spored, broadly clavate, semi-fissitunicate, with a large apical dome, a distinct ocular chamber, and a K/I+ bluish ring-structure, Arthonia-type. Ascospores 1-septate, hyaline, clavate, 10.5-15(-18) x (3-)4.5-5(-6) μm, with a gelatinous perispore reacting I+ red. Photobiont: absent. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a widespread but not common lichenicolous fungus growing on different saxicolous crustose lichens (mainly Porpidiaceae and Agyriaceae); the sample from Tuscany was on Trapelia coarctata.

Growth form: Lichenicolous fungus

Substrata: rocks, soil, terricolous mosses, and plant debris

Reproductive strategy: mainly sexual

paras crustose lichens

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

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

Henk-Jan van der Kolk - Source: https://waarneming.nl/species/643498/

The Netherlands

Henk-Jan van der Kolk - Source: https://waarneming.nl/species/643498/

The Netherlands