ITALIC 8.0

Staurothele sienae B. de Lesd.

Bull. Soc. Bot. France, 86: 81, 1939.

Synonyms:

Distribution: C - Tosc.

Description: Thallus crustose, episubstratic, dark grey, rimose-areolate or areolate-granulose, up to 1 mm thick, forming up to 1 cm wide, often confluent patches. Perithecia numerous, black, globose, 0.2-0.4 mm across (in section), immersed in the thallus at the base. Exciple black throughout; involucrellum present, black, 0.2-0.3 mm wide, mostly superficial; hymenial gel I+ red (I+ blue at very low concentrations of iodine), K/I+ blue; hymenial algae globose, 3-4 μm wide; hamathecium of periphyses and periphysoids, interascal filaments absent. Asci 8-spored, clavate, the wall thickened above, with an ocular chamber, after dehiscence with a delicate extruded endotunica, I-, K/I-. Ascospores muriform, at first hyaline, then turning pale brown, ellipsoid, 30-40 x 15-21 μm. Photobiont chlorococcoid, present in both thallus and hymenium. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a poorly known species of basic siliceous rocks at relatively low elevations, also reported from the Pyrenees and Greece. The type material was collected on a sandstone wall (see Nimis 1993: 670).

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: 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 Sipna -(B 60 135178); picture length = 7 mm;; Owner: Source: https://archive.bgbm.org/digitalimages/Aegean/Staurothele/P3030039.jpg

Identification not certain (cf.)