ITALIC 7.0

Verrucaria attica (J. Steiner) J. Steiner

Verh. zool.-bot. Ges. Wien, 61: 39, 1911. Basionym: Verrucaria rupestris var. attica J. Steiner - Sitzungsber. K. Akad. Wiss., nath. naturwiss. Cl., 107: 177, 1898.

Synonyms:

Distribution: S - Si (Ottonello & Salone 1994, Grillo & al. 2007).

Description: Thallus crustose, endosubstratic, pale brown, smooth and continuous. Upper cortex (lithocortex) poorly developed; algal layer discontinuous, the photobiont cells in clusters; medulla prosoplectenchymatous, with oil cells (macrosphaeroids) in the lower part. Perithecia black, 0.3-0.4 mm across, completely immersed in the rock and leaving deep pits when they fall off. Involucrellum absent; exciple bottle-shaped to broadly pyriform, colourless except near the ostiole, where it tends to be thicker; hamathecium of periphyses in the ostiolar canal, and short periphysoids in the half upper part of the perithecial cavity; 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, 15-25 x 9-14 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a very poorly known species of calciferous rocks, with a few records from the eastern part of the Mediterranean Region. Ecological indicator values refer to the situation observed in Sicily (Marettimo Island).

Growth form: Crustose endolithic

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: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 04

TSB 16269

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (16269)
2001/12/03