Bacidina inundata (Fr.) Vězda

Folia Geobot. Phytotaxon., 25: 432, 1991. Basionym: Biatora inundata Fr. - K. Svenska Vetensk.-Akad. Handl.: 270, 1822.
Synonyms: Bacidia arnoldiana var. inundata (Fr.) Körb.; Bacidia inundata (Fr.) Körb.; Bacidia inundata subsp. allecta (Nyl.) A.L. Sm.; Bacidia subinundata (Nyl.) Blomb. & Forssell; Lichingoldia gyalectiformis D. Hawksw. & Poelt; Woessia inundata (Fr.) Sérus. & Diederich
Distribution: N - TAA (Nascimbene 2008b), Lomb (UPS-L166849), Piem (Isocrono & al. 2004). C - Tosc, Sar. S - Camp (Aprile & al. 2003b), Bas (Puntillo & al. 2012), Cal (Puntillo 1996), Si (Grillo 1998, Grillo & Caniglia 2004).
Description: Thallus crustose, episubstratic, continuous or rimose, the surface granulose-warted, grey-green to greenish brown, often delimited by a white, fimbriate prothallus. Apothecia biatorine, sessile, pale cream-coloured to deep reddish brown or (rarely) black-brown when old, 0.2-0.6(-0.8) mm across, with an initially concave, then flat and finally convex disc, and a thin, usually paler, finally often excluded proper margin. Proper exciple dark brown or violet-brown brown in outer and upper parts, colourless within; epithecium pale brown, K+ purplish, scarcely differentiated from the hymenium; hymenium mostly colourless, 45-55 μm high; paraphyses mostly simple, 1-1.5(-2) μm thick at mid-level, the apical cells often swollen, 3.5-5 μm wide; hypothecium colourless or pale yellow in upper part. Asci 8-spored, cylindrical-clavate, approaching the Bacidia-type, but the ocular chamber wider, and the axial body never penetrating through the entire d-layer, surrounded by a narrow, darker amyloid layer. Ascospores 3(-7)-septate hyaline, needle-like, 20-45 x 1.5-2.5(-3) µm. Pycnidia rare, of two types: a) white, with 23-55 x 0.5-1 μm, curved conidia, b) brown, with 11-19 x c. 1 μm, curved conidia. Photobiont chlorococcoid, the cells 5-12(-14) μm in diam. Spot tests: thallus and apothecia K-, C-, KC-, P-, UV-. Chemistry: no lichen substances in thallus.
Note: apparently this is a holarctic lichen, found on periodically inundated or otherwise moist siliceous rocks, more rarely on lignum, in humid-shaded situations, with a wide altitudinal range.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: very rare
Montane belt: rare
Submediterranean belt: extremely rare
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 8305

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (15120)

Pier Luigi Nimis- CC BY-SA 4.0
Herbarium: TSB 8305

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9309)