ITALIC 8.0

Thelidium obscurum (Garov.) Zschacke

Hedwigia, 62: 133, 1921. Basionym: Verrucaria olivacea var. obscura Garov. - Tent. Disp. Lich. Langob.: 64, 1865.

Synonyms: Involucrothele obscura (Garov.) Servít

Distribution: N - TAA (Herb. Nascimbene 1539), Lomb, Emil (Fariselli & al. 2020). S - Cal.

Description: Thallus crustose, episubstratic, rather thick, black, with a black medullary layer of vertically arranged hyphae. Perithecia black, 0.2-.0.3 mm across, usually immersed in hemispherical thalline warts and hence covered with a thalline layer, apple-shaped in section. Involucrellum well-developed: exciple brown only near the ostiole, otherwise colourless; hymenium colourless, the hymenial gel I-. Asci 8-spored, narrowly ellipsoid to clavate, I-, fissitunicate, the wall thickened above, ocular chamber usually present; dehiscence by extrusion of a delicate endotunica as a long rostrum. Ascospores (0-)1-septate, hyaline, ellipsoid, 21-30 x 9-13 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a poorly known species of sheltered calcareous rocks.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

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

Domenico Puntillo; Owner: Domenico Puntillo

Italy

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