Bacidina vasakii (Vězda) Vězda

Folia Geobot. Phytotaxon., 25: 432, 1991. Basionym: Bacidia vasakii Vězda - Folia Geobot. Phytotaxon., 18: 64, 1983.
Synonyms: Woessia vasakii (Vězda) Sérus.
Distribution: S - Camp (Puntillo & al. 2000, Puntillo 2000), Bas (Puntillo & al. 2012), Cal (Puntillo 1995, 1996, 2000, Puntillo & Puntillo 2004).
Description: Thallus crustose, thinly episubstratic, ecorticate, grey-green, minutely granulose-coralloid, consisting of 50-65 μm wide, at first globose, then elongated goniocysts. Apothecia biatorine, constricted at base, 0.2-0.8 mm across, yellow-orange to orange-red, with a flat to convex, epruinose disc, and a weakly prominent, finally excluded proper margin. Proper exciple paraplectenchymatous, without crystals, of very thin-walled (0.5-1 μm), not distinctly radiating hyphae, mostly colourless; epithecium colourless or pale green, indistinctly delimited from the hymenium, K-, N-; hymenium mostly colourless, 45-75 μm high; paraphyses mostly simple, 1-1.5 μm thick at mid-level, the apical cells clavate or only slightly thickened, up to 5 μm wide; hypothecium poorly developed, colourless to straw-coloured. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass) never penetrating through the entire d-layer, the wall K/I-, but the thin outer gel K/I+ blue, Bacidia-type. Ascospores 3-7-septate, hyaline, needle-like, (30-)35-45(-50) x 0.8-1.5(-2) μm. Photobiont chlorococcoid, the cells 5-12(-14) μm in diam. Spot tests: thallus and apothecia K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a mild-temperate to humid pantropical species described from the Caucasus and also known from the Pyrenees, found in the understory of forests, mostly on twigs and leaves of Buxus. In Italy it is restricted to warm-humid situations and undisturbed stands of the Tyrrhenian ecoregion, mostly in the Mediterranean belt. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c), but it is easy to overlook and it could be somehow more widespread.
Growth form: Crustose
Substrata: leaves
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
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: very rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis CC BY-SA 4.0
TSB 9047

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30803)

P.L. Nimis CC BY-SA 4.0
TSB 9047