ITALIC 8.0

Thelidium aethioboloides Zschacke

Hedwigia, 62: 44, 1920.

Synonyms:

Distribution: N - Ven (Thüs & Nascimbene 2008, Nascimbene 2008c), TAA (Thüs & Nascimbene 2008, Nascimbene 2008b).

Description: Thallus crustose, episubstratic, black-brown, olive or dark grey-green, thin to thick, continuous or weakly rimose, subgelatinous and more or less transparent in marginal parts when wet. Uppermost parts of thallus yellowish to brown, paraplectenchymatous; medulla poorly developed, sometimes with a an orange-brown basal layer. Perithecia black, 0.2-0.3 mm across, basally immersed in the rock, otherwise immersed in projecting thalline warts, exposing only the naked ostiolum. Involucrellum apical to reaching the thallus base, laterally extended in the thallus; exciple colourless to very pale brown; hamathecium of up to 21 μm long periphyses and periphysoids, interascal filaments absent; hymenial gel I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, ellipsoid to clavate, 73-93 x 22-36 μm, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of a delicate rostrum. Ascospores (1-)2(-3)-septate, hyaline ellipsoid. (25-)30-40 x 10-15 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: amphibious, but usually not permanently submerged, on calciferous rocks in shaded situations, with optimum in the upper montane belt; perhaps more widespread in the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

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

J. Nascimbene CC BY-SA 4.0

Source: Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain

J. Nascimbene CC BY-SA 4.0