ITALIC 8.0

Verrucaria subcuneata Servít

Webbia, 8: 417, 1952.

Synonyms:

Distribution: N - Lig.

Description: Thallus crustose, episubstratic, dull brown, 0.15-0.2 mm thick, rimose-areolate, the areoles flat, 0.2-0.8 mm wide. Cortex not differentiated, the thallus subparaplectenchymatous throughout; algal cells irregularly distributed, concentrated in the upper part of thallus. Perithecia black, 1 per areole, slightly projecting. Involucrellum black, adpressed to exciple, 30-40 µm thick, reaching down to base-level; exciple 0.2-0.25 mm across, the wall colourless to yellowish brown; hamathecium of periphyses and periphysoids measuring 20-25 x c. 2.5 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, narrowly ellipsoid, (15-)16-20(-22) x (5.5-)6-7.5(-8) µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: according to Breuss (2016) this poorly known species, described from Val Bisagno near Genova, is also present in the Alps of Austria and Germany. Ecological indicator values are tentative: from the scanty available information the species seems to grow on calciferous rocks in rather shaded situations, such as in forests.

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

Oromediterranean belt: absent

Montane belt: very 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

Index Fungorum GBIF

© The Trustees of the Natural History Museum, London – CC BY-SA NC 4.0

Source: Servit, M 1950: Novae species italicae lichenum Pyrenocarporum. - Ann. Museo. Civico di Storia Nat. di Genova 64: 48-55.