ITALIC 8.0

Rinodina occulta (Körb.) Sheard

Lichenologist, 3: 349, 1967. Basionym: Buellia occulta Körb. - Parerga Lichenol.: 186, 1860.

Synonyms: Lecanora tegulicola Nyl.; Rinodina diplocheila Vain.; Rinodina tegulicola (Nyl.) J. Steiner; Rinodina verrucarioides H. Magn.

Distribution: N - Lomb (Favero-Longo & al. 2023), VA (Piervittori & Isocrono 1999, Matteucci & al. 2015d), Lig. C - Sar. S - Camp (Jatta 1909-1911).

Description: Thallus crustose, episubstratic, thin, areolate-verrucose, grey to ochraceous brown, often delimited by a dark prothallus. Apothecia at first lecanorine and subimmersed, then soon cryptolecanorine to lecideine and adnate, usually abundant and confluent, 0.1-0.3 mm across, with a soon convex, brown-black disc, and a thin, often soon excluded proper margin, sometimes with an ephemeral thalline margin when very young. Exciple poorly developed, sometimes containing a few algal cells at base; epithecium c. 10 µm high, red-brown to dark brown; hymenium colourless, 50-80 µm high; paraphyses 1.5-2 µm thick at mid-level, the apical cells, capitate, 3-6 µm wide, with a brown cap; hypothecium colourless, to 60 µm high. Asci 8-spored, 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 (10-)12-16(-18) x (5.5-)6-8 µm, Physcia-type, some of them tending towards the Physconia-type at maturity, the torus poorly developed, the ontogeny of type A (apical wall thickening after septum formation). Photobiont chlorococcoid. Spot tests: thallus K+ yellow (reaction often faint), C-, KC-, P- or P+ faintly yellow. Chemistry: cortex with atranorin and chloroatranorin.

Note: on vertical or rain-sheltered surfaces of hard siliceous rocks; to be looked for more intensively, especially in Tyrrhenian Italy and in the dry Alpine valleys.

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)

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

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

Harrie Sipman http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis

Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis