ITALIC 8.0

Polyozosia agardhiana subsp. catalaunica (Cl. Roux) ined.

provisionally placed here, ICN Art. 36.1b. . Basionym: Lecanora agardhiana subsp. catalaunica Cl. Roux - Bull. Soc. linn. Provence, 54: 120, 2003.

Synonyms: Myriolecis agardhiana subsp. catalaunica (Clauzade & Cl. Roux) Nimis & Cl. Roux

Distribution: C - Sar.

Description: Thallus crustose, endosubstratic, not apparent. Apothecia lecanorine, immersed in pits in the rock at least when young, later subsessile, 0.2-0.6 mm across, with a flat, dark brown to black, pruinose disc, and a thin, smooth, entire thalline margin. Thalline exciple corticate, usually more or less obscured by crystals which are insoluble in K, but soluble in N; epithecium greenish brown to patchily green and brownish, not granular, K-, N+ purple; hymenium colourless, 35-45 μm high; paraphyses slender, simple, free in K; hypothecium colourless, without granules. Asci 8-spored, elongate-clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 9-11 x 5.5-6.5 μm. Photobiont chlorococcoid. Spot tests: thallus (apothecial margin) K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a taxon worthy of further study, found on inclined surfaces of hard, compact calciferous rocks, mostly at low elevations.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: 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

P.L. Nimis CC BY-SA 04

TSB 24502

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

Herbarium: TSB (24502)
2001/11/25
ssp. sapaudica with a epilithic thallus and prominent apothecia