Gyalecta ulmi (Sw.) Zahlbr.

Gyalecta ulmi (Sw.) Zahlbr.

in Engler & Prantl, Natürl. Pflanzenfam., 1, 1: 126, 1905. Basionym: Lichen ulmi Sw. - N. Acta Acad. Upsal., 4: 247, 1784.

Synonyms: Gyalecta rubra (Hoffm.) A. Massal.; Lecania rubra (Hoffm.) Müll. Arg.; Lecanora rubra (Hoffm.) Ach.; Lepadolemma rubrum (Hoffm.) Trevis.; Phialopsis rubra (Hoffm.) Körb.; Phialopsis ulmi (Sw.) Arnold

Distribution: N - Ven, Lomb, Piem, Emil (Fariselli & al. 2020). C - Tosc, Marc, Umb (Ravera 1998, Ravera & al. 2006, 2021c), Laz (Ravera 2001), Abr (Nascimbene & al. 2019, Gheza & al. 2021), Sar (Zedda 2002, 2002b, Zedda & al. 2001). S - Pugl (Nimis & Tretiach 1999), Bas (Potenza 2006, Potenza & Fascetti 2012, Ravera & al. 2021c), Cal (Puntillo 1996), Si (Grillo 1996).

Description: Thallus crustose, thin, smooth, rarely cracked or finely verrucose-granular, white to white-grey. Apothecia 0.5-2 mm across, finally sessile, with a concave to flat, pink, reddish or finally reddish brown, initially thinly white-pruinose disc, and a densely white-pruinose, smooth to crenate proper margin. Proper exciple thick, of rounded cells; epithecium orange-brown to chestnut brown; hymenium and hypothecium colourless; paraphyses coherent, simple or sparingly branched in upper part; hypothecium colourless. Asci 8-spored, cylindrical to elongate-subclavate, thin-walled, without tholus, the wall and the contents I+ blue. Ascospores 3-septate (rarely with an additional oblique septum), hyaline, broadly ellipsoid, (12-)15-20(-25) x 5-7(-9) μm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a temperate lichen found on mature trees (especially near the base of Ulmus, but also on other trees with base-rich bark, such as Acer and Fraxinus), more rarely on mosses on steeply inclined faces of calciferous rocks, probably more frequent in the past; there are no recent records from Northern Italy. It is included in the Italian red list of epiphytic lichens as “Near-threatened” (Nascimbene & al. 2013c).

Growth form: Crustose

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

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: very 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

Domenico Puntillo; Owner: Domenico Puntillo

Italy

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

Herbarium: TSB (11473)
2001/11/24

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

Herbarium: TSB (11473)
2001/11/24

Andres Saag; Owner: University of Tartu

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Sardinia
2014

Felix Schumm – CC BY-SA 4.0

[556], Germany, Baden-Württemberg, Stuttgart, Rotwildpark, an alter Quercus. Leg. E. Putzler 06.05.1950

Zahlbruckner A. 1926. Lichenes (Flechten). In: Engler A. (ed.): Die natürlichen Pflanzenfamilien. 2nd ed., vol 8, W. Engelmann, Leipzig, 270 pp.

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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

France, sur frêne - Lans-en-Vercors - Isère
2/1/2017

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