Gyalidea phyllophila Vězda

Acta Mus. Silesiae, Opava, ser. A, 22: 89, 1973.
Distribution: S - Camp (Puntillo & al. 2000, Puntillo 2000).
Description: Thallus crustose, thinly episubstratic, forming c. 1 mm wide, often confluent, whitish to grey, orbicular patches on the leaves of Buxus. Apothecia lecideine, usually 1(-2) per thalline patch, 0.3-0.35 mm across, with a pale brown to reddish brown, concave to flat disc, and a raised, usually darker proper margin. Proper exciple of radially arranged hyphae; epithecium colourless to brownish; hymenium colourless, I+ yellowish to reddish brown; paraphyses simple, free or partially bound with the asci in a gelatinous matrix, 1-1.5 µm thick, not thickened at apex; hypothecium colourless. Asci 8-spored, narrowly clavate, thin-walled, apically thickened, the wall I-. Ascospores (1-)3-6-septate, hyaline, narrowly ellipsoid, (11-)15-19(-24) x 5-7 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a foliicolous species described from Africa, and also known from the Pyrenees; in the only Italian station, a warm-humid coastal valley, it was found on the leaves of Laurus. It is included in the Italian red list of epiphytic lichens as “Critically Endangered” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: leaves
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Restricted to humid-warm, oceanic areas

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model

Domenico Puntillo - CC BY-SA 4.0

Pier Luigi Nimis - CC BY-SA 4.0
Herbarium: TSB 9442

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9442)


Vezda, A (1973) Foliicole Flechten aus der Republik Guinea. I. Acta Mus. Silesiae, Ser. A. [Opava]

Etayo, J/ Vezda, A (1994) Two new species of Gyalidea from Europe. Lichenologist

Puntillo, D/ Bricaud, O/ Serusiaux, E (2000) A further locality with foliicolous lichens in Italy, with taxonomical and ecological data on foliicolous lichens in Western Europe. Cryptogamie, Mycologie

R. Lucking (2008) Foliicolous Lichenized Fungi.

Urbanavichene, I.N./ Urbanavichus, G.P. (2016) Contribution to the lichen fiora of the Shakhe River valley (Krasnodar Territory, western Transcaucasia). Novosti Sistematiki Nizshikh Rastenii