Aspicilia fluviatilis A. Nordin & Owe-Larss.
Lichenologist, 43: 30, 2011.
Synonyms: Aspicilia cinerea f. alpina Arnold ?
Description: Thallus crustose-placodioid, episubstratic, cream-coloured, pale grey or ochraceous grey, partly with a brownish tinge, 0.2-0.5 mm thick, the inner part irregularly cracked-areolate, in outer part forming a dendroid branching pattern, the areoles smooth, flat to slightly convex, angular and 0.2-0.4 mm wide in central parts, elongate, radiating, branched and 0.5-1 mm long in marginal parts. Cortex paraplectenchymatous, obscured by norstictic acid crystals, c. 22-43 μm. thick, the cells c. 5-9 μm wide; epinecral layer up to 8 μm thick; medulla white, with abundant Ca-oxalate crystals; hypothallus absent or dark brown to black, visible between the areoles in the inner part of the thallus, sometimes also in the marginal zone. Apothecia aspicilioid, immersed to broadly attached, round to irregular, sometimes confluent, 0.2-0.7 mm across, 1-2(-4) per areole, with a dark brown to black, at first smooth but soon uneven, concave to slightly convex, sometimes grey-white pruinose (norstictic acid) disc, the thalline margin blackening in older apothecia, usually with a white inner rim. Proper exciple c. 40-55 μm thick in upper part, narrowing below; epithecium brown-green (Caesiocinerea-green), N+ green, K+ red-brown; hymenium colourless, 50-100 μm high; paraphyses branched and anastomosing, the apical cells mainly moniliform, subglobose, up to 3.5 μm wide; hypothecium colourless, 40-90 μm high. Asci 8-spored, clavate, the thin outer coat K/I+ blue, the wall and apical dome K/I-. Ascospores 1-celled, hyaline, broadly ellipsoid, 15-25(-28) x (5-)7-13(-16) μm. Pycnidia rare, the wall pigmented in upper part only. Conidia thread-like, 11-17 x c. 1 μm. Photobiont chlorococcoid. Spot tests: thallus and sometimes apothecial disc (pruina) K+ yellow turning red (needle-like crystals), C-, KC-, P+ yellow orange. Chemistry: norstictic acid in cortex and in the pruina of the apothecia; Caesiocinerea-green pigment in the epithecium.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Courtesy Katarzyna Szczepańska
WRSL-7949, collected by Ferdinand Arnold in 1888 in the Italian Alps.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
