Verrucaria elaeomelaena (A. Massal.) Arnold

Verh. zool.-bot. Ges. Wien, 18: 958, 1868. Basionym: Lithocia eleaomelaena A. Massal. - Atti Ist. Ven. Sc. Lett. Arti, ser. 3, 2: 380, 1856.
Synonyms: Verrucaria davosiensis Zschacke; Verrucaria degenerascens Nyl. ex A.L. Sm.; Verrucaria jurana Zschacke
Description: Thallus crustose, episubstratic, continuous or (rarely) weakly cracked, smooth, subgelatinous when wet, 20-150 μm thick, greenish-grey to grey in shade forms, pale to dark brown in sun-forms, sometimes delimited by a thin, whitish prothallus. Cortex poorly developed; medulla not differentiated or sometimes forming a 5-75 μm thick, pigmented basal layer. Perithecia black, (0.2-)0.4-1.2 mm in diam., numerous (36-113/cm2) distinctly to weakly projecting, usually almost completely covered with a thin thalline layer. Involucrellum 17-25 μm thick, of very variable extension, from apical to reaching base-level; exciple 0.2-0.35 mm across, the wall colourless or brownish in upper part, always colourless at base, with a transparent area between exciple base and the basal part of involucrellum; hamathecium of (18-)20-25(-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. Ascospores 1-celled, hyaline, broadly ellipsoid to ovoid, (18-)23-28(-32) x (9.5-)12-14(-16) μm, 1.6-2.1(-2.3) as long as wide, when young often with a distinct gelatinous sheath. Photobiont chlorococcoid, the cells arranged in vertical rows. 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: very rare
Subalpine belt: rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

pH of the substrata:

12345
info

Solar irradiation:

12345
info

Aridity:

12345
info

Eutrophication:

12345
info

Poleotolerance:

0123
info

Altitudinal distribution:

123456
info

Rarity

absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

P.L. Nimis CC BY-SA 4.0
TSB 41190


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34463)
2002/01/15


P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (36802)
2008.02.25


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34463)
2002/01/15


P.L. Nimis CC BY-SA 4.0
TSB 41190


P.L. Nimis CC BY-SA 4.0
TSB 41190


P.L. Nimis CC BY-SA 4.0
TSB 41190


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Felix Schumm - CC BY-SA 4.0
[ABL77844], Brazil, Mato Grosso do Sul, Bodoquena, along Salubre river, along river on shale. 20°46’´56'' S, 56°44’33'' W, 210 m. Leg. A. Aptroot (no 77844), 7.11.2018, det. A. Aptroot, 2019. - Spores hyaline, simple, 25 x 1 μm.


Felix Schumm - CC BY-SA 4.0
[ABL77844], Brazil, Mato Grosso do Sul, Bodoquena, along Salubre river, along river on shale. 20°46’´56'' S, 56°44’33'' W, 210 m. Leg. A. Aptroot (no 77844), 7.11.2018, det. A. Aptroot, 2019. - Spores hyaline, simple, 25 x 1 μm.


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).
Cross-section of a perithecium of Verrucaria elaeomelaena (isolectotype BM). Scale bar: 50 μm


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).
Thallus of Verrucaria elaeomelaena (isolectotype BM). Scale bar: 5 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


Source: Servít M. 1954a. Lichenes familiae Verrucariacearum. Prag, 249 pp.