Bacidina egenula (Nyl.) Vězda
Folia Geobot. Phytotaxon., 25: 432, 1991. Basionym: Lecidea egenula Nyl. - Flora, 48: 147, 1865.
Synonyms: Bacidia egenula (Nyl.) Arnold; Bacidia epiphylla Wheldon & Travis; Bacidia mediterranea B. de Lesd.; Bacidia peltigericola Vain.; Woessia egenula (Nyl.) van den Boom & P. Alvarado
Distribution: N - TAA (Nascimbene & al. 2021), Lomb (UPS-L166833), Lig. C - Camp (Aprile & al. 2002), Cal (Puntillo 2011).
Description: Thallus crustose, episubstratic, finely granulose, continuous to rimose, glaucous green to greenish brown, consisting of (15-)20-60(-90) µm thick goniocysts. Apothecia biatorine, (0.15-)0.2-0.6(-0.8) mm across, with a grey-brown, bluish-brown to black, flat to slightly convex, epruinose disc, and a usually persistent, often paler, finally sometimes excluded proper margin. Proper exciple 30-50 µm wide laterally, without crystals, blue-green, green-brown to purplish brown in upper and outer parts, more or less colourless in lower and inner parts; epithecium blue-green, green-brown to green-black, K-, N+ violet-red, sometimes with brown spots reacting K+ purplish, N+ orange; hymenium colourless, 35-60 µm high (more than a third of the apothecium height); paraphyses rather coherent, mostly simple, 1-1.5(-2) µm thick at mid-level, the apical cells 2-6 µm wide; hypothecium orange-brown in upper part, colourless in lower part, the pigmented parts K+ green-brown. 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, acicular, clavate, or long-bacilliform, mostly curved or flexuose, (15-)25-40(-45) x 1.5-2.5 µm, tapering at one end. Pycnidia semi-immersed in thallus, white. Conidia curved to sigmoid, 0-3-septate, 20-35 x c. 1 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances; hypothecium with the Arnoldiana-brown pigment. Note: a mild-temperate to humid subtropical species, most common on pebbles, old bricks or roofing tiles in shaded or semi-shaded habitats, also over moist ground in areas with siliceous substrata, sometimes on bark in the basal parts of trunks or on wood; certainly overlooked and probably more widespread in Tyrrhenian Italy, with outposts in the Insubrian District of the Alps.
Growth form: Crustose
Substrata: rocks, bark, and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual, or asexual by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Pioneer species
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: very rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
Herbarium samples
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Author: André Aptroot. Source: http://www.tropicallichens.net/ CC BY-SA-NC
Felix Schumm - CC BY-SA 4.0
VZ1713], Magna Britannia. Anglia. West Sussex, prope Midhurst,
Rogate, Rogate Field Centre, 60 m. Ad lateres muri loco umbroso. Leg.
B. J. Coppins, 30.5.1973, det. B. J. Coppins et A. Vezda. EX A. VEZDA:
LICHENES SELECTI EXSICCATI NR. 1713.
Felix Schumm - CC BY-SA 4.0
VZ1713], Magna Britannia. Anglia. West Sussex, prope Midhurst,
Rogate, Rogate Field Centre, 60 m. Ad lateres muri loco umbroso. Leg.
B. J. Coppins, 30.5.1973, det. B. J. Coppins et A. Vezda. EX A. VEZDA:
LICHENES SELECTI EXSICCATI NR. 1713.
Growth form: Crustose
Substrata: rocks, bark, and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual, or asexual by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Pioneer species
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: very rare
Humid mediterranean belt: extremely rare
Dry mediterranean belt: absent
Predictive model
| Herbarium samples |
INDEX FUNGORUM
GBIF
DOLICHENS
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Canary Islands; La Gomera-NW; se of Vallehermoso: El Tion. On volcanic rocks
Author: André Aptroot. Source: http://www.tropicallichens.net/ CC BY-SA-NC
Felix Schumm - CC BY-SA 4.0
VZ1713], Magna Britannia. Anglia. West Sussex, prope Midhurst, Rogate, Rogate Field Centre, 60 m. Ad lateres muri loco umbroso. Leg. B. J. Coppins, 30.5.1973, det. B. J. Coppins et A. Vezda. EX A. VEZDA: LICHENES SELECTI EXSICCATI NR. 1713.
