ITALIC 8.0

Psora saviczii (Tomin) Follmann & A. Crespo

Philippia, 2: 283, 1975. Basionym: Lecidea saviczii Tomin - Nat. Agric. arid Reg. USSR: 47, 1927.

Synonyms:

Distribution: N - Emil (Nimis & al. 1996, Vezda Lich.Rar.Exs. 259, Fariselli & al. 2020).

Description: Thallus squamulose, pale pink to pinkish white, often thinly white-pruinose, the squamules rounded, initially concave, then flattened, dispersed to contiguous, not imbricate, 2-4 mm wide, with down-turned, concolorous or more rarely whitish edges. Upper cortex of thin-walled hyphae with round lumina; lower cortex absent. Apothecia biatorine, sessile, 1-1.5 mm across, with a black, sometimes white-pruinose, convex, smooth disc and an indistinct proper margin. Epithecium reddish brown, containing orange crystals dissolving in K, K+ purple, N-; hymenium colourless, amyloid; paraphyses coherent, stout, simple or sparingly branched and anastomosing, the apical cell slightly swollen; hypothecium brownish, with crystals of calcium oxalate. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a tube, the sides of which stain I/KI+ deep blue, without an ocular chamber, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 11-18 x 6-8 μm, thin-walled. Pycnidia immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances, epithecium with anthraquinones, mainly parietin.

Note: a mainly gypsicolous, southern species in Europe, to be looked for in other areas with gypsum outcrops (e.g. in Sicily).

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

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)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: very 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

Herbarium samples

INDEX FUNGORUM GBIF

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (20694)
2001/11/29

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (20694)
2001/11/29
detail of pruina

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (35722)
2003/01/22

Source: https://nhm2.uio.no/typephotos/lichens/arkiv/O-L-001146d.jpg

RUSSIA: [Cyrillic handwriting], 1926.07.00, Tomin 14 - ISOTYPE

Felix Schumm - CC BY-SA 4.0

[VZR259], Italia. Emilia-Romagna, prov. Bologna, Tossignano, loco Croara dicto, 220 m. Ad terram gymsaceam. Leg. D. Puntillo, D. Salvadori & M. Tretiach, 3.11.1996. EX A. VEZDA: LICHENES RARIORES EXSICCATI NR. 259.

Felix Schumm - CC BY-SA 4.0

[VZR259], Italia. Emilia-Romagna, prov. Bologna, Tossignano, loco Croara dicto, 220 m. Ad terram gymsaceam. Leg. D. Puntillo, D. Salvadori & M. Tretiach, 3.11.1996. EX A. VEZDA: LICHENES RARIORES EXSICCATI NR. 259.