ITALIC 8.0

Porina ahlesiana (Körb.) Zahlbr.

Cat. Lich. Univ., 8: 99, 1931. Basionym: Segestrella ahlesiana Körb. - Parerga Lichenol.: 324, 1865.

Synonyms: Porina globosa (Taylor) A.L. Sm.; Porina insiliens (Larbal.) A.L. Sm.; Porina insularis (Larbal.) A.L. Sm.; Porina septemseptata (Hepp ex Zwackh) Swinscow non (Kremp.) Zahlbr.

Distribution: N - Piem (TSB 32846). C - Tosc (Tretiach 2015o).

Description: Thallus crustose, episubstratic, continuous to irregularly cracked, pale olive-brown, greenish grey or pale yellowish brown. Perithecia hemispherical, semi-immersed in the thallus, pale orange-brown, translucent when wet, 0.3-0.5(-0.7) mm in diam., the ostiolar region at first reddish brown, then black. Involucrellum of thick-walled cells, containing several photobiont cells, yellowish brown in section (Porina-yellow pigment), K+ orange; exciple yellow; paraphyses simple or rarely branched; hymenial gel I-, K/I-. Asci 8-spored, clavate-cylindrical, thin-walled throughout, functionally unitunicate, dehiscent by rupture of the apex, with no extruded inner layers and with an apical ring structure in the truncate apex, I-, K/I-. Ascospores (5-)7-septate, hyaline, 30-50(-70) x 6-9(-15) μm. Pycnidia pale grey-pink. Conidia 6-7 x c. 0.5 μm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus without lichen substances.

Note: a rare species of shaded-humid siliceous rocks, with a somehow western distribution in Europe and a wide altitudinal range.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: extremely 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

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 40957

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

Herbarium: TSB (32846)
2003/03/12

Pier Luigi Nimis - CC BY-SA 4.0

TSB 40957

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

Herbarium: TSB (32846)
2003/03/12

Pier Luigi Nimis - CC BY-SA 4.0

TSB 40957