ITALIC 8.0

Thelotrema suecicum (H. Magn.) P. James

Lichenologist, 9: 186, 1977. Basionym: Ocellularia suecica H. Magn. - Bot. Not.: 125, 1937.

Synonyms:

Distribution: N - Frl (Tretiach 2004). S - Camp (Ravera & al. 2016).

Description: Thallus crustose, endo- to thinly episubstratic, pale yellowish grey to pale greyish green, smooth, continuous to verruculose or finely rimose. Medulla white, densely packed with crystals of calcium oxalate. Apothecia usually numerous, evenly distributed, deeply immersed in prominent, conical thalline warts which are 1-2 mm wide at the base, and have an open, up to 0.4 mm wide, crater-like summit with an irregular rim, the disc to 0.7 mm across, blackish or grey-pruinose, surrounded by a prominent proper margin which is usually free from the thalline margin. Proper exciple thin, brownish to yellowish in outer part, colourless to very pale yellow within, apically covered by greyish granules, of densely conglutinated, short-celled hyphae; epithecium colourless to brownish, with greyish granules; hymenium colourless, up to c. 130 µm high, not inspersed with oil droplets; paraphyses weakly conglutinated, mostly simple, thickened at apex; periphysoids present, lining the upper inner surface of the exciple; hypothecium colourless. Asci (2-)4-6(-8)-spored, subcylindrical, with a single functional wall layer, abruptly thickened at apex, K/I-. Ascospores (3-)5-7-septate, hyaline, ellipsoid to broadly fusiform, the ends narrowly rounded to subacute, non-amyloid to faintly amyloid, 20-35(-40) x 8-12(-15) µm, with 4-6(-8), rounded to angular, subglobose or cuboid cells, surrounded by a thin to thick halo. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a very rarely collected, mainly western species also known from the Austrian Alps, found on bark in montane, humid forests. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 30535

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

Herbarium: TSB (35535)
2003/03/19

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

Herbarium: TSB (35535)
2003/03/19