ITALIC 8.0

Thelidium sbarbaronis Servít

Webbia, 10: 441, 1954.

Synonyms:

Distribution: C - Tosc.

Description: Thallus crustose, hemiendosubstratic, grey, turning green when wet, rimose-areolate, without a distinct prothallus, the areoles 0.2-0.4 mm wide, flat to slightly convex, the surface sometimes granulose. Cortex paraplectenchymatous, up to 20 μm thick, brownish, the cells globose, up to 4 μm wide; algal layer up to 100 μm thick, the algal cells arranged in clusters; medulla white, up to 200 μm thick, partially parenchymatous. Perithecia black, c. 0.35 mm across, immersed in the thallus with at least the lower half, hemispherically projecting with the upper part, which is not covered by thallus, with a poorly evident ostiole. Involucrellum indistinct; exciple globose, brown-black throughout, the wall up to 40 μm thick in lower part, slightly thicker in upper part; hamathecium of up to 40 μm long periphyses, interascal filaments absent; hymenial gel I+ red (I+ blue at very low concentrations of I), K/I + blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of a delicate rostrum, 55-65 x 20-22 μm. Ascospores (0-)1-septate, hyaline, ellipsoid to oblong, 19-26 x 11-14 μm, rounded at both ends. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a very poorly known calcicolous species described from the surroundings of Siena (Solaia) in the submediterranean belt. It is very similar to Th. minutulum, differing in the exciple which is dark throughout.

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: absent

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

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

Source: Servit M.1954: Novae lichenum pyrenopcarporum species in Italia inventae. II. - Webbia  10(1): 441-446

Field Museum of Natural History - Botany Department Creator: NSF/Mellon - GPI (c) Field Museum of Natural History - CC BY-NC 4.0 Description: Thelidium sbarbaronis Servít, Italy, C. Sbarbaro 31193, Isotype, F