ITALIC 7.0

Scytinium biatorinum (Nyl.) Otálora, P.M. Jørg. & Wedin

Fungal Divers. (online version), 64: 290, 2013.. Basionym: Collema biatorinum Nyl. - Act. Soc. Linn. Bordeaux, 21: 268, 1856.

Synonyms: Leptogium biatorinum (Nyl.) Leight.; Leptogium cretaceum (Sm.) Nyl.; Leptogium pusillum Nyl.

Distribution: N - VG (Castello 2002, Martellos & Castello 2004), Lomb, Emil (Fariselli & al. 2020), Lig. C - Marc, Sar.

Description: Thallus small-squamulose to granular-crustose, brown to blackish brown, usually forming a thin crust of rosette-like 0.3-0.5(-1) mm wide, 50-120 µm thick squamules with crenate margins, which sometimes are reduced to 0.05-0.1 mm wide granules. Upper and lower cortices of irregularly isodiametrical, angular cells; algal layer with broad short-celled hyphae throughout. Apothecia common, laminal, sessile, (0.2-)0.4-0.7(-1) mm across, with a blackish brown, concave to flat disc and a thick proper margin. Proper exciple paraplectenchymatous; epithecium brownish; hymenium colourless, 70-90 µm high; paraphyses coherent, mostly simple, the apical cells slightly swollen; hypothecium colourless. Asci 8-spored, cylindrical-clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores submuriform, usually with 2 transverse septa, hyaline, broadly ellipsoid, (23-)25-30 x (8-)11-14 µm. Photobiont cyanobacterial (Nostoc, the cells in clusters or in short chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: a temperate ephemeral lichen of disturbed habitats, most frequent on concrete walls, but also found on calciferous soil; certainly more widespread but overlooked, or confused with other species

Growth form: Crustose

Substrata: rocks, soil, terricolous mosses, and plant debris

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

Reproductive strategy: mainly sexual

Pioneer species

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: very rare

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 04

TSB 34309

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

Herbarium: TSB (34309)
2001/12/12

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

Herbarium: TSB (34309)
2001/12/12