ITALIC 8.0

Verrucaria collematodes Garov.

Tentam. Dispos. Lich. Langob.: 31, 1865.

Synonyms:

Distribution: N - Ven, Lomb, Emil (Fariselli & al. 2020), Lig. C - Tosc, Sar (Nascimbene & al. 2023). S - Camp.

Description: Thallus crustose, episubstratic, subgelatinous when wet, cracked-areolate, well-delimited, brown-black to black when dry, dark brownish green when wet, epruinose, the areoles smooth, flat to convex, not blastidiate at margin. Cortex paraplectenchymatous; algal cells arranged in more or less vertical columns; medulla with a well developed, carbonaceous black basal layer. Perithecia black, 0.5-0.7 mm across, entirely immersed or slightly projecting, often laterally covered by thallus. Involucrellum adpressed to exciple, extending to the lowest part of the perithecium and merging with the black basal layer; exciple subglobose, 0.2-0.35 mm across, the wall dark brown; hamathecium of periphyses and periphysoids, 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, 18-27 x 8-10 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: mostly on calciferous or base-rich siliceous substrata, including roofing tiles, walls and mortar; on the whole a rather poorly known taxon of the V. nigrescens-complex, reported from different countries in Central and Southern Europe.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Pioneer species

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: rather rare

Padanian area: very rare

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

Dry mediterranean belt: very rare

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

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.1 - Public Domain

G. Gibelli, in S. Garovaglio, 1865 Tentamen Dispositionis Methodicae Lichenum In Longobardia Nascentium. Mediolanum

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