ITALIC 7.0

Verrucaria eggerthii J. Steiner

Verh. zool.-bot. Ges. Wien, 61: 40, 1911.

Synonyms:

Distribution: S - Si (Grillo 1998, Grillo & Caniglia 2004, Grillo & al. 2007b).

Description: Thallus crustose, hemiendosubstratic, whitish grey, smooth and continuous. Upper cortex (lithocortex) poorly developed; medulla prosoplectenchymatous, with oil cells (macrosphaeroids) in lower part. Perithecia black, bottle-shaped, up to 0.6 mm across and to 0.7 mm high, completely immersed in the rock and leaving pits when they fall off. Involucrellum absent; exciple pyriform, colourless except near the ostiole where it is brown-black; 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, 29-39 x 12.5-16 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a saxicolous eu-Mediterranean species known only from the type locality in Corfu (Greece), from Croatia, and from Sicily. The first Italian record (see Nimis 1993: 738) was probably identified by Servìt.

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: 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

Index Fungorum GBIF