ITALIC 8.0

Acarospora imbricatula H. Magn.

Mitt. bot. Staatss. München, 9/10: 435, 1954.

Synonyms:

Distribution: N - TAA, VA (Piervittori & Isocrono 1999).

Description: Thallus crustose, episubstratic, medium brown, epruinose, areolate, the areoles 0.5-2 mm wide, the largest ones almost subsquamulose, with more or less free margins, contiguous to imbricate, often irregularly sulcate. Cortex 20-30 μm thick, yellowish brown in upper part, colourless in lower part, the cells 3-5 μm wide, overlain by an epinecral layer of variable thickness; algal layer irregular, discontinuous, penetrating the medulla in tooth-like columns. Apothecia lecanorine, 0.5-2 mm across, with a flat to strongly convex, dark brown, smooth disc, and a thin to thick thalline margin. Proper exciple thin and poorly developed throughout; epithecium brown; hymenium colourless, 80-140 μm high, the hymenial gel hemiamyloid, K/I+ light blue fading to light red; paraphyses 2-2.5 μm thick at base; hypothecium colourless. Asci >100-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, narrowly ellipsoid, 5-7 x 2-3 μm. Pycnidia immersed. Conidia ellipsoid, c. 3 x 1 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: hitherto known only from dry-continental Alpine valleys, often starting the life-cycle on Aspicilia-species on south-facing surfaces of siliceous rocks, where it is locally common.

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)

paras Aspicilia-species when young

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: extremely 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