ITALIC 7.0

Psorotichia lugubris (A. Massal.) Arnold

Flora, 68: 218, 1885.. Basionym: Stenhammara lugubris A. Massal. - Miscell. Lichenol.: 40, 1856

Synonyms:

Distribution: N - Frl (Nascimbene & al. 2021), TAA.

Description: Thallus crustose, areolate-verruculose, thick, black to dark olive-brown, epruinose, the areoles dying from the base, with a smooth or only slightly rough surface, but often partially eroded, exposing the pale, cottony lower surface. Apothecia usually difficult to observe in non-eroded areoles, immersed to subsessile, 0.3-0.6 mm across, with a blackish, often rough but never rilled disc surrounded by a blackish to brownish, thin proper margin, and an indistinct thalline margin. Proper exciple thin, pale brown in lower part, distinctly thickened and dark brown in upper part; epithecium orange-brown; hymenium colourless, K/I+ blue; paraphyses stout, branched and anastomosing, the apical cells subcapitate; hypothecium colourless or pale yellowish brown, K/I+ blue. Asci 8-spored, cylindrical-clavate, with a rather thick, not amyloid wall, without apical thickening but with an external layer of amyloid apical gel. Ascospores 1-celled, hyaline, ellipsoid to broadly ellipsoid, 6-12 x 4-8.5 µm. Photobiont cyanobacterial, chroococcoid, single-celled, the cells with a more or less distinct vertical arrangement, surrounded by a brownish gelatinous sheath. Spot tests: all negative. Chemistry: without lichen substances.

Note: on dry surfaces of calcareous rocks with some water seepage after rain; overall distribution poorly known, with a few scattered records from the Alps; the species likely belongs to Metamelanea.

Growth form: Crustose

Substrata: rocks

Photobiont: cyanobacteria, coccaceous (e.g. Gloeocapsa)

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 16661

P.L. Nimis CC BY-SA 4.0

TSB 16661

P.L. Nimis CC BY-SA 4.0

TSB 16661

P.L. Nimis CC BY-SA 4.0

TSB 16661

P.L. Nimis CC BY-SA 4.0

TSB 16661