ITALIC 8.0

Xanthoria stiligera Giralt, Nimis & Poelt

J. Hattori Bot. Lab., 74: 281, 1993.

Synonyms:

Distribution: S - Camp (Garofalo & al. 1999), Pugl.

Description: Thallus foliose, heteroemrous, dorsiventral, closely adpressed, orange to orange-red, forming regular to irregular, often confluent, 2(-3) cm wide rosettes. Lobes 0.5-1(-2) mm wide, mostly convex, but often flattened at the ends, with numerous, at first papilliform, later clavate to cylindrical, prostrate to erect, simple or sparingly branched, 0.05-0.08(-0.1) mm thick isidia; lower surface white or pale yellow, concave, folded, with numerous, mostly marginal, whitish hapters. Upper and lower cortices paraplectenchymatous; medulla white, rather loose, the hyphae 3-4 µm thick, often running parallel to the substrate. Apothecia rare, lecanorine/zeorine, to 2.5 mm across, strongly constricted at base, with a concave to flat, dark orange (usually darker than thallus) disc, and a thin, continuous, often isidiate and sometimes finally excluded thalline margin. Thalline exciple 100-200 µm wide laterally; proper exciple 70-80 µm wide; epithecium orange, K+ purple-red; hymenium colourless, 50-60 µm high; paraphyses c. 2 µm thick at base, the apical cells swollen, up to 5 µm wide; hypothecium colourless, up to 50 µm high. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores mostly poorly developed, 2-celled, polarilocular, hyaline, broadly ellipsoid, 9-12 x (6-)7-9 µm, the equatorial thickening (“septum”) 6-7 µm. Pycnidia immersed into orange-red warts. Conidia ellipsoid, 2.5-3 x 1-1.2 µm. Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ purple-red, C-, KC-, P-, UV+ intensely orange-red. Chemistry: thallus and apothecia with unidentified anthraquinones.

Note: a strictly Mediterranean calcicolous species, ecologically similar to X. mediterranea, known from several stations throughout the southern part of the Mediterranean region, and from the Negev-desert; often confused with X. calcicola and X. mediterranea in the past.

Growth form: Foliose, broad lobed

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: very rare

Dry mediterranean belt: very rare

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

Index Fungorum GBIF

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

Herbarium: TSB (21795)
2001/12/03
detail of isidia

Manuel Gil

Spain, Canary Islands, Guatisea, Lanzarote

Manuel Gil

Spain, Canary Islands, Guatisea, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote