ITALIC 7.0

Verrucaria cinereorufa Schaer.

Lich. Helv. Spicil., 7: 338, 1836.

Synonyms: Verrucaria clauzadei de Lesd. ?

Distribution: N - Frl (Breuss 2008), Lomb, Piem (Morisi 2005), Lig.

Description: Thallus crustose, endosubstratic or thinly episubstratic, not subgelatinous when wet, brownish grey to brown, continuous to finely rimose near the perithecia, dull, abruptly delimited, sometimes with a thin black prothallus. Cortex poorly developed; algal layer thin. Perithecia black, numerous, 40-60(-100)/cm², half to ¾ immersed in the rock and leaving shallow to deep pits when they fall off, the upper part hemispherically projecting, c. 0.35-0.45 mm across, with a convex to slightly flattened ostiolar region. Involucrellum reaching the upper half of the perithecium and there c. 150 μm thick; exciple subglobose, 0.3-0.4 mm across, the wall dark brown to black; hamathecium of branched and anastomosing periphyses and periphysoids measuring 80-100 x (1.5-)3-4 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, (28-)30-40(-41) x (13-)14-16(-18) μm. Photobiont chlorococcoid, the cells not arranged in vertical columns. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a poorly known species of periodically humid surfaces of calcareous or dolomitic rocks, also reported from the western Pyrenees and from several sites of Western and Central Europe.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

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

Herbarium samples

Index Fungorum GBIF

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