ITALIC 8.0

Thalloidima albilabrum (Dufour) Flagey

Catal. Lich. Algérie: 63, 1896.. Basionym: Biatora albilabra Dufour in Fries - Lichenogr. Eur. Ref.: 251, 1831.

Synonyms: Lecidea albilabra (Dufour) Dufour; Psora albilabra (Dufour) Körb. non auct.; Toninia albilabra (Dufour) H. Olivier; Toninia albomarginata B. de Lesd.

Distribution: N - TAA, VA (Piervittori & Isocrono 1999), Emil (Nimis & al. 1996, Fariselli & al. 2020), Lig. C - Sar. S - Camp (Aprile & al. 2003b, Garofalo & al. 2010), Cal (Puntillo 1996), Si (Nimis & al. 1994, Ottonello & Puntillo 2009, Ottonello & al. 2011).

Description: Thallus squamulose, reddish brown, often with a greenish tinge, slightly glossy, white-pruinose at margin. Squamules 1-2(-4) mm wide, contiguous, orbicular to slightly lobed, weakly concave to weakly convex, with regular and usually deep fissures in the cortex; lower surface white to pale brown. Upper cortex 70-500 µm thick, including an up to 400 µm thick epinecral layer, sometimes with crystals of calcium oxalate in upper part; algal layer continuous; medulla white, often with crystals of calcium oxalates. Apothecia frequent, lecideine, sessile, strongly constricted at base, 1-1.5(-2.5) mm across, with a black, but most often white-pruinose, more or less flat, smooth disc, and a distinct, smooth, concolorous proper margin. Proper exciple reddish brown, sometimes greyish and N+, K+ violet in outer rim; epithecium grey, K+ and N+ violet; hymenium colourless, 60-70 µm high; paraphyses not conglutinated, simple or sparingly branched and anastomosing in upper part, thin-walled, the apical cell distinctly swollen and covered by a gelatinous pigment cap; hypothecium brownish. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 1-septate, hyaline, fusiform, 13.5-22.5 x 3-4 μm. Pycnidia dark, immersed. Conidia filiform. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances; Sedifolia-grey pigment in apothecia.

Note: a mainly Mediterranean species found on more or less calciferous ground and in fissures of rocks and walls, often on cyanobacteria or cyanobacterial lichens when young; common only in dry areas, including the Alpine valleys with a continental climate.

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rather rare

Submediterranean belt: rare

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: very rare

Dry mediterranean belt: extremely 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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 20576

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

P.L. Nimis CC BY-SA 04

TSB 15814