ITALIC 8.0

Thelidium submethorium (Vain.) Zschacke

Hedwigia, 62: 140, 1920. Basionym: Verrucaria aeneovinosa subsp. submethoria Vain. - Meddeland. Soc. Fauna Fl. Fenn., 19: 170, 1883.

Synonyms:

Distribution: N - TAA (Thüs & Nascimbene 2008, Nascimbene & al. 2022).

Description: Thallus crustose, episubstratic, olive-brown to brown-grey, thin to thick (10-130 μm), continuous to finely rimose, paraplectenchymatous, more or less subgelatinous and with transparent margins when wet. Cortex absent, but upper part of thallus occasionally with a brownish pigment; basal layer absent; photobiont cells irregularly arranged. Perithecia black, prominent, (0.25-)0.36(-0.5) mm across. Involucrellum variable, even within a single thallus, from apical and adpressed to exciple to spreading and reaching the thallus base, moderately thick (<90 μm in upper third), 0.25-0.5 mm across; exciple 0.15-0.28 mm in diam., the wall 40-60 µm thick; hamathecium of periphyses and periphysoids, interascal filaments absent; periphyses up to 30 μm long. Asci 8-spored, ellipsoid to clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of a delicate rostrum. Ascospores (0-)1-septate, hyaline, ellipsoid, 26-39 x 9-18 μm, without a perispore. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a rare species of siliceous substrata in clean creeks and rivers of high mountain ranges, with optimum above treeline.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

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

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5

6

(info)

Predictive model

Herbarium samples

INDEX FUNGORUM GBIF DOLICHENS