Verrucaria margacea (Wahlenb.) Wahlenb.
Fl. Lappon.: 465, 1812. Basionym: Thelotrema margaceum Wahlenb. in Ach. - Meth. Lich. Suppl.: 30, 1803.
Synonyms: Lithocia margacea (Wahlenb.) A. Massal.; Verrucaria applanata Hepp; Verrucaria divergens Nyl.?; Verrucaria filarszkyana Szatala; Verrucaria leightonii Hepp non A. Massal.; Verrucaria tiroliensis Zschacke; Verrucaria vallis-flueelae Zschacke?
Description: Thallus crustose, episubstratic, continuous or cracked especially around the perithecia, smooth to uneven, pale to dark brown or grey-brown, 15-70 μm thick, not distinctly subgelatinous when wet, sometimes delimited by a thin whitish prothallus. Cortex poorly developed; algal layer paraplectenchymatous; medulla poorly developed, proso- to paraplectenchymatous, without a dark basal layer. Perithecia almost completely covered with a thin thalline layer, forming (0.3-)0.35-0.8(-1.3) mm wide projections, the apical part finally often naked. Involucrellum 12-40 μm thick, conical, reaching to base-level and there spreading, the space between its base and the exciple colourless or often with a dark pigment which is evenly distributed through the cell walls; exciple 0.15-0.27 x 0.16-0.33 mm, the wall colourless to brown; hamathecium of 20-40 μm long periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, pyriform to obovate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type, 80-100 x 25-35 μm. Ascospores 1-celled, hyaline, ellipsoid, (20-)26-36(-41) x (8-)11-15(-18) μm. Photobiont chlorococcoid, the cells not arranged in vertical columns. 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
Periodically submerged (e.g. in creeks)
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: rare
Montane belt: very rare
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
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005
P.L. Nimis CC BY-SA 04
TSB 16078
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16078)
2001/12/03
Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Source: Thüs H., Orange A., Gueidan C., Pykälä J., Ruberti C., Lo Schiavo F. & Nascimbene, J. (2015) Phytotaxa 197(3): 161-185 Revision of the Verrucaria elaeomelaena species complex and morphologically similar freshwater lichens (Verrucariaceae, Ascomycota).
Specimen Thüs W Ice016 of Verrucaria margacea (BM). Scale bar: 1 mm
Source: Thüs H., Orange A., Gueidan C., Pykälä J., Ruberti C., Lo Schiavo F. & Nascimbene, J. (2015) Phytotaxa 197(3): 161-185 Revision of the Verrucaria elaeomelaena species complex and morphologically similar freshwater lichens (Verrucariaceae, Ascomycota).
Isotype of Verrucaria margacea (W). Scale bar: 1 mm
Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.
Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.
Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.
as Verrucaria applanata
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: rare
Montane belt: very rare
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
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005
P.L. Nimis CC BY-SA 04
TSB 16078
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16078)
2001/12/03
Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Texte_V/Verrucaria_margacea.htm
France, 25/8/2018 - Col du Petit Mont Cenis, alt. 2200 m - Savoie
Source: Thüs H., Orange A., Gueidan C., Pykälä J., Ruberti C., Lo Schiavo F. & Nascimbene, J. (2015) Phytotaxa 197(3): 161-185 Revision of the Verrucaria elaeomelaena species complex and morphologically similar freshwater lichens (Verrucariaceae, Ascomycota).
Specimen Thüs W Ice016 of Verrucaria margacea (BM). Scale bar: 1 mm
Source: Thüs H., Orange A., Gueidan C., Pykälä J., Ruberti C., Lo Schiavo F. & Nascimbene, J. (2015) Phytotaxa 197(3): 161-185 Revision of the Verrucaria elaeomelaena species complex and morphologically similar freshwater lichens (Verrucariaceae, Ascomycota).
Isotype of Verrucaria margacea (W). Scale bar: 1 mm
Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.
Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.
