ITALIC 7.0

Psorotichia pictava (Nyl.) Forssell

N. Acta Reg. Soc. Sci. Upsal., ser. 3, 13: 75, 1885. Basionym: Pyrenopsis pictava Nyl. - Flora, 52: 82, 1869.

Synonyms: Collemopsis pictava (Nyl.) Nyl.

Distribution: N - Lig.

Description: Thallus crustose, black, epruinose, thin, poorly delimited, areolate, pseudoparenchymatous throughout, the areoles 0.2-1 mm across (the smallest ones appearing as granules), often convex, with an uneven surface, usually scattered. Apothecia immersed or semi-immersed, 1 per areole, with an initially punctiform, later slightly expanded, urceolate, reddish brown disc surrounded by a thin thalline margin. Proper exciple poorly differentiated; epithecium orange-brown; hymenium colourless; paraphyses branched and anastomosing only slightly constricted at septa; hypothecium colourless. Asci 8-spored, cylindrical-clavate, with a rather thick, not amyloid wall, without apical amyloid thickenings. Ascospores 1-celled., hyaline, subglobose, 9-11 x 7-9 µm. Photobiont cyanobacterial, chroococcoid, of a few cells surrounded by a gelatinous sheath which is yellowish brown near the thallus surface. Spot tests: all negative. Chemistry: without lichen substances.

Note: on sunny surfaces of calcareous rocks, mostly in the Mediterranean belt; a very poorly known taxon, which needs further study.

Growth form: Crustose

Substrata: rocks

Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)

Reproductive strategy: mainly sexual

On otherwise dry surfaces with short periods of water seepage after rain

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: extremely 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

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3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

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6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF