Verrucaria weddellii Servít
Stud. Bot. Cech., 7: 80, 1946.
Synonyms: Verrucaria transiliens auct. non (Arnold) Lettau
Description: Thallus crustose, episubstratic, rimose-areolate, brown, smooth to slightly rough, 0.2-0.4 mm thick, the areoles angular, flat to slightly convex, 0.3-0.6 mm wide, incompletely subdivided by cracks. Cortex 10-20 µm thick, overlain by a thin epinecral layer; algal layer 50-100 µm thick; medulla subparaplectenchymatous, with a colourless upper part and brownish lower zone with substrate particles and crystals, not forming a black basal layer. Perithecia black, 1-3 per areole, remaining immersed in raised portions of the areoles and almost completely covered with a thalline layer, only the very tips naked. Involucrellum extending almost to base-level, laterally 40-80 µm thick, slightly thinning toward the base, arching slightly away from exciple, the space inbetween pale and packed with crystals; exciple subglobose, 0.3-0.4 mm across, the wall 20-25 µm thick, brown to brown-black; hamathecium of branched-anastomosing periphysoids measuring 35-50 x 2.5-4 µm, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid or oblong-ovoid, 20-25 x 9-12 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study
Commonnes-rarity: (info)
Alpine belt: absent
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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Source: Servit, M 1949: Nove nebo mene zname druhy lisejnikove celedi Verrucariaceae. Species Verrucariacearum (Lichenes) novae vel minus cognitae. - Sbornik Narodniho Musea v Praze 5(9): 1-51. Tab.3 - Public Domain
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study
Commonnes-rarity: (info)
Alpine belt: absent
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
