ITALIC 8.0

Gyalecta derivata (Nyl.) H. Olivier

Bull. Géogr. Bot., 21: 193, 1911. Basionym: Lecidea derivata Nyl. - Flora, 48: 603, 1865.

Synonyms: Gyalecta croatica Zahlbr.; Gyalecta decipiens Samp.; Gyalecta truncigena var. biformis (Körb.) Vězda; Gyalecta truncigena var. croatica (Zahlbr.) Vězda; Gyalecta truncigena var. derivata (Nyl.) Boistel

Distribution: C - Tosc, Umb (Ravera 1999, Ravera & al. 2006), Laz (Massari & Ravera 2002, Ravera 2006c, Munzi & al. 2012), Abr (Caporale & al. 2009, Corona & al. 2016), Mol (Paoli & al. 2015), Sar (Cossu 2013). S - Camp (Ravera & al. 2021), Bas ( CLU 5170), Cal (Puntillo 1996), Si (Nimis & al. 1994, Ravera & al. 2023b).

Description: Thallus crustose, endosubstratic or thinly episubstratic, whitish, pale grey to green-grey, usually poorly evident. Apothecia 0.2-0.4 mm across, at first more or less immersed and urceolate, later becoming half-emergent, with a concave, flesh-coloured to dull orange, rarely dark brown disc and a thick, raised, usually smooth proper margin. Proper exciple thick, colourless or pale brown in outer part, not consisting of angular cells; epithecium hardly differentiated from the hymenium; hymenium colourless; paraphyses mostly simple, septate, 1.2-1.5 μm thick at mid-level, the apical cells hardly swollen; hypothecium colourless. Asci 8-spored, thin-walled, lacking an apical apparatus or tholus, K/I+ blue. Ascospores (5-)7-13-transversally septate, rarely with a 1-2 perpendicular longitudinal septa, hyaline, oblong-fusiform, 20-33 x 3-6 μm. Photobiont trentepohlioid. Spot tests: thallus and apothecia K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species of the G. truncigena-group with elongate-fusiform ascospores occasionally having 1-2 straight longitudinal septa, widespread in Europe and also known from Northern Africa, but rather rare, found on broad-leaved trees (especially Acer and Fraxinus) in humid areas; mostly Tyrrhenian in Italy (there are also scattered records from the Alps outside the Italian territory). It is included in the Italian red list of epiphytic lichens as “Near-threatened” (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: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely 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

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Marta Gonzalez Garcia

Spain, Asturias, Jardín Botánico de Gijón, on Juglans regia

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

Central Europe: Germany; rare.

P.L. Nimis CC BY-SA 04

TSB 35441

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

Herbarium: TSB (17889)
2001/11/24

P.L. Nimis CC BY-SA 4.0

TSB 17889