ITALIC 8.0

Thelidium subabsconditum Eitner

Jahresber. schles. Ges. vaterl. Cultur: 54, 1910.

Synonyms: Thelidium circumvallatum Zschacke ?

Distribution: N - TAA (Nascimebene & al. 2021, 2022).

Description: Thallus crustose, thinly episubstratic, bluish grey to pale brown, smooth or finely granulose. Perithecia black, globose, 0.1-0.2 mm across, completely immersed and not evident from above, or visible only for the punctiform ostiolar region, sometimes surrounded by a thalline swelling or a paler circular area. Involucrellum absent; hamathecium of 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, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of a delicate rostrum. Ascospores. 1-septate, hyaline, ellipsoid, 18-23 x 7-9(-11) µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: widespread in the Alps (Nimis et al. 2018a) on inclined surfaces of compact calciferous rocks in rather shaded, non-eutrophicated situations near or above treeline. Since it was not always distinguished from similar species, it has an apparently incomplete distribution in the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely 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

P.L. Nimis CC BY-SA 04

Herb. J.Nascimbene

Pier Luigi Nimis CC BY-SA 4.0

Italy, Veneto, Malga Erera - Dolomiti Bellunesi
Herb. J.Nascimbene

Pier Luigi Nimis CC BY-SA 4.0

Italy, Veneto, Malga Erera - Dolomiti Bellunesi
Herb. J.Nascimbene

Pier Luigi Nimis CC BY-SA 4.0

Italy, Veneto, Malga Erera - Dolomiti Bellunesi
Herb. J.Nascimbene