ITALIC 8.0

Gyalecta thelotremella Bagl.

N. Giorn. Bot. Ital., 11: 87, 1879.

Synonyms: Petractis thelotremella (Bagl.) Vězda

Distribution: N - Ven (Isocrono & al. 2026). C - Tosc, Sar (Alonso & Egea 1994). S - Camp (Nimis & Tretiach 2004, Garofalo & al. 2010), Pugl (Nimis & Tretiach 1999), Cal (Puntillo 1996), Si (Alonso & Egea 1994, Nimis & al. 1994).

Description: Thallus crustose, thinly episubstratic or partly endosubstratic, 100-400 µm thick, continuous to finely rimose, pinkish white to yellowish white, turning white in the herbarium. Apothecia 0.2-0.3 mm across, immersed in the thallus and partly in the rock, at first covered with a thin thalline layer which soon disrupts leaving a kind of false thalline margin, appearing perithecioid when young, the disc later expanded, concave, pale yellow to flesh-coloured, smooth, surrounded by a thin, whitish proper margin. Proper exciple to 40 μm thick in upper part, colourless, often with crystals of calcium oxalates; epithecium colourless; hymenium colourless, 130-180 μm high; paraphyses 1.2-1.5 μm thick at mid-level, the apical cells hardly swollen; hypothecium colourless, c. 20 μm high. Asci 8-spored, thin-walled, lacking an apical apparatus or tholus, the wall K/I+ blue. Ascospores muriform with 3-5 transverse septa and 1-3 longitudinal septa, ellipsoid to broadly ovoid, 14-25 x 7-12 μm, not halonate. Pycnidia completely immersed in the thallus. Conidia bacilliform, straight, 6-7 x c. 1 μm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on compact calcareous rocks in sheltered situations, often found together with Neopetractis luetkemuelleri, mostly Tyrrhenian, but also present in Veneto and in Puglia, where it is not rare along the rocky coasts.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: rather rare

Dry mediterranean belt: very rare

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 DOLICHENS

P.L. Nimis CC BY-SA 04

TSB 15955

P.L. Nimis CC BY-SA 04

TSB 38311

P.L. Nimis CC BY-SA 04

TSB 15955

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_thelotremella.htm

France, session AFL 2015 dans le Lot, Blanzaguet

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_thelotremella.htm

France, session AFL 2015 dans le Lot, Blanzaguet

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_thelotremella.htm

France, session AFL 2015 dans le Lot, Blanzaguet

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_thelotremella.htm

France, session AFL 2015 dans le Lot, Blanzaguet

Felix Schumm - CC BY 4.0

[VZ2389], Gallia. Corsica. Roccapina, 10 m. Ad sxa granitica. Leg. D. Puntillo, 28.7.1989, det. A. Vezda. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 2389.

Felix Schumm - CC BY 4.0

[VZ2389], Gallia. Corsica. Roccapina, 10 m. Ad sxa granitica. Leg. D. Puntillo, 28.7.1989, det. A. Vezda. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 2389.

Source: Vězda A. (1965) Preslia 37: 127-143 Flechtensystematische Studien I. Die Gattung Petractis Fr.

Source: Vězda A. (1965) Preslia 37: 127-143 Flechtensystematische Studien I. Die Gattung Petractis Fr.