ITALIC 8.0

Rinodina venostana Buschardt & H. Mayrhofer

in Mayrhofer & Poelt, Bibl. Lichenol., 12: 155, 1979.

Synonyms: Rinodina exigua f. saxicola Anzi

Distribution: N - TAA (Giralt & Llimona 1997), Lomb, Piem (Isocrono & al. 2004). C - Tosc, Sar.

Description: Thallus crustose, episubstratic, pale grey to grey, rimose-areolate to verrucose, most often almost completely covered with apothecia, without a clear prothallus. Apothecia lecanorine, crowded, slightly immersed in thallus to sessile, up to 0.5 mm across, with a black, more or less flat disc, and a prominent, entire thalline margin. Epithecium brown; hymenium colourless, 80-100 µm high; paraphyses branched in upper part, c. 1.5 µm thick at mid-level, the apical cells capitate, 3-5 µm wide; hypothecium colourless, up to 150 µm high. Asci 8-spored, broadly clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, 15-20 x 7.5-10.5 µm, Physcia-type, with a well-developed, often tripartite torus and ontogeny of type A (apical wall thickening after septum formation). Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: apparently without lichen substances.

Note: a species known from the southern part of central Europe to the Mediterranean area, extending to Macaronesia, found on slightly calcareous schists. The old records from Tuscany and Sardinia (Nimis 1993: 639) require confirmation.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

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

Index Fungorum GBIF