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 - Lig. C - Tosc (Loppi & al. 2004b), Sar.
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: absent
Padanian area: absent
Humid submediterranean belt: extremely rare
Humid mediterranean belt: very rare
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis CC BY-SA 04
TSB 13706

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13706)

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13706)