ITALIC 7.0

Toninia tristis subsp. asiae-centralis (H. Magn.) Timdal

Opera Bot., 110: 112, 1991. Basionym: Lecidea asiae-centralis H. Magn. - Lich. Centr. Asia: 55, 1940.

Synonyms:

Distribution: N - Frl, TAA, Lomb, Piem (TSB 34198). C - Umb (Genovesi & Ravera 2001, Ravera & al. 2006). S - Cal (Puntillo 1996).

Description: Thallus squamulose, chestnut brown to dark brown, shiny. Squamules bullate, contiguous to scattered, up to 2(-3) mm wide, often with a central depression, with punctiform impressions developing into pores; lower surface pale. Upper cortex 40-160 µm thick, including an up to 100 µm thick epinecral layer, without crystals; algal layer continuous; medulla white, without crystals. Apothecia frequent, lecideine, strongly constricted at base, up to 2 mm across, with a black, flat to convex, smooth disc, and a distinct, smooth, concolorous proper margin. Proper exciple medium to dark brown (sometimes with a green tinge) in the rim, usually paler brown within, K-, N- or N+ violet, lacking crystals; epithecium brown, K-, N+ violet; hymenium colourless, 60-70 µm high; paraphyses not coherent, anastomosing, distinctly thickened above; hypothecium brownish-orange, with a K+ red pigment in upper part (and in the lumina of many paraphyses, asci and ascospores). Asci 8-spored, clavate, surrounded by a gelatinous I+ blue coat, with a well-developed I+ blue tholus, a I+ darker blue tube and a well-developed ocular chamber, Bacidia-type. Ascospores 1-septate, hyaline, ellipsoid to fusiform, 12.5-19 x 3.5-5.5 μm. Pycnidia dark, immersed. Conidia filiform. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus with terpenoids.

Note: on calciferous rocks and soil; despite the name, this subspecies is widespread also in Southern and Central Europe, with scattered outposts north to Greenland.

Growth form: Squamulose

Substrata: rocks, soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: very rare

Montane belt: very rare

Submediterranean belt: rare

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: very rare

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

TSB 35346

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (35346)
2003/03/06

P.L. Nimis CC BY-SA 04

TSB 17921