ITALIC 8.0

Toninia tristis (Th. Fr.) Th. Fr. subsp. tristis

Lichenogr. Scand., 2: 341, 1874. Basionym: Psora tabacina var. tristis Th. Fr. - Bot. Not.: 38, 1865.

Synonyms: Toninia tabacina auct. p.p. et sensu A. Massal.

Distribution: N - Lomb, VA (Piervittori & Isocrono 1999), Lig (Watson 2014).

Description: Thallus squamulose, chestnut brown to dark brown, epruinose, the squamules bullate, sometimes flattened or with a central depression, scattered to contiguous, up to 2(-3) mm wide, 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 lecideine, rounded, sessile, strongly constricted at base, up to 2 mm across, with a black, flat, smooth disc, and a distinct, smooth proper margin concolorous with disc. Proper exciple medium to dark brown (sometimes with a green tinge) in outer part, usually paler brown within, K-, N- or N+ violet (green pigment), lacking crystals; epithecium brown, sometimes with a faint greenish tinge, K-, faintly N+ violet; hymenium colourless, 60-70 µm high; paraphyses not coherent, anastomosing, distinctly thickened above; hypothecium brownish, without orange and yellow pigments. Asci 8-spored, clavate, surrounded by a gelatinous I+ blue coat, with a well-developed I+ blue tholus with a I+ darker blue tube and a well-developed ocular chamber, Bacidia-type. Ascospores mainly 1-septate, hyaline, ellipsoid to fusiform, 13.5-20.5 x 3.5-5 µm. Pycnidia dark, immersed. Conidia filiform. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus with terpenoids.

Note: in fine crevices of calciferous rocks, with optimum near and above treeline.

Growth form: Squamulose

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

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: rather rare

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

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 11499

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

Herbarium: TSB (11499)
2001/12/01

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

Herbarium: TSB (11499)
2001/12/01