ITALIC 8.0

Gyalecta arbuti (Bagl.) Baloch & Lücking

in Baloch & al., Lichenologist, 45: 726, 2013. Basionym: Bacidiopsis arbuti Bagl. - Comm. Soc. Critt. Ital., 1: 22, 1861.

Synonyms: Bacidia arbuti (Bagl.) Jatta; Pachyphiale arbuti (Bagl.) Arnold

Distribution: N - Emil (Ravera & al. 2022), Lig. C - Tosc (Loppi & al. 2004b, Ravera & al. 2021c), Sar. S - Camp (Ravera & al. 2021c).

Description: Thallus crustose, thinly episubstratic, whitish, somehow glossy, sometimes poorly evident. Apothecia 0.3-0.6 mm across, usually numerous, urceolate, gelatinous and translucent when wet, with a concave, orange or reddish brown to finally dark brown disc, and a darker, thick, raised, smooth proper margin. Proper exciple well-developed, of narrow, thin, compacted hyphae, reddish brown in outer part, pale within; epithecium reddish brown; hymenium colourless; paraphyses simple, septate, more or less hooked at tips; hypothecium colourless. Asci 16-48-spored, thin-walled, lacking an apical apparatus or tholus, K/I+ blue. Ascospores transversely 6-12-septate, hyaline, acicular, straight to slightly curved, (26-)32-46(-52) x 3-4.5 µm, with apiculate ends. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-. Chemistry: no lichen substances.

Note: a species of Mediterranean, rather humid forests, frequently confused with G. carneola. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (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: absent

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

P.L. Nimis CC BY-SA 04

TSB 13706

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

Herbarium: TSB (13706)
2001/11/28

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

Herbarium: TSB (13706)
2001/11/28