ITALIC 8.0

Swinscowia calcarea (Bricaud & Cl. Roux) S.H. Jiang, Lücking & Sérus.

in Hongsanan & al., Fungal Divers.: 10.1007/s13225-020-00462-6, 138, 2020. Basionym: Strigula calcarea Bricaud & Cl. Roux - Bull. Soc. linn. Prov., 42: 13, 1991.

Synonyms:

Distribution: N - VG (Tretiach 1997, Tretiach & Rinino 2006).

Description: Thallus crustose, endosubstratic, penetrating to c. 4 mm in the calcareous rock, pale greenish grey to pale pinkish grey, turning whitish in the herbarium, continuous; the thalli are usually of two types: one with perithecia, the other with macropycnidia. Perithecia 0.2-0.3 mm across, obpyriform to subglobulose, entirely immersed in the rock, colourless to pale pink, except sometimes at the brown ostiole; dead perithecia leave evident pits in the rock. Involucrellum absent; hymenium colourless, I-; paraphysoids mostly simple, thread-like, c. 1 μm thick, longer than the asci, slightly branched and anastomosing only where adjacent to exciple. Asci 8-spored, narrowly clavate, bitunicate-fissitunicate, shortly stalked at base, the apex thickened into a tholus, with a narrow ocular chamber, I-. Ascospores 3-septate, hyaline, subfusiform, (15-)17-22(-23) x (4-)5.5-7(-8) μm. Pycnidia often of two types. Macropycnidia 0.12-0.18 mm across, entirely immersed, pale except at apex; macroconidia subapically inserted on the conidiogenous cell, (2-)3(-4)-septate, cylindrical to subfusiform, with a gelatinous appendage, (13-)15-19(-22.5) x 3.5-5.5 μm. Micropycnidia 0.08-0.12 mm diam.; microconidia shortly cylindrical, (2-)3-4(-5) x 1-1.5 μm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus without lichen substances.

Note: a recently-described species found on limestone in submediterranean woodlands, mostly in rather shaded situations; known from the Trieste Karst, but perhaps more widespread in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual, or asexual by conidia and thalloconidia

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

P.L. Nimis CC BY-SA 04

TSB 22576

Mauro Tretiach - CC BY-SA 4.0

Trieste, Betrween Santa Croce and Filtri TSB 22831

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

Herbarium: TSB (22576)
2001/12/11