ITALIC 8.0

Lecidella pulveracea (Schaer.) P. Syd.

Die Flecht. Deutschl.: 211, 1887. Basionym: Lecidea enteroleuca var. pulveracea Flörke ex Schaer. - Enumer. Critic. Lich. Europ.: 128, 1850.

Synonyms: Biatora pulveracea (Schaer.) Stein.; Lecidea dubia Turner & Borrer non Schaer.; Lecidea pulveracea (Schaer.) Th. Fr.

Distribution: N - Frl (TSB 15106), Ven (Nascimbene & Marini 2010), TAA (Nascimbene & al. 2006, 2007b).

Description: Thallus subleprose, consisting in a thin to rather thick, continuous or cracked crust of farinose, to 0.1 mm thick, pale yellowish white to yellowish grey blastidia. Apothecia very rare, lecideine, 0.3-0.8 mm across, at first immersed in the thallus, then sessile, with flat to finally convex, black disc and a thin, often wavy, finally excluded proper margin. Proper exciple dark blue-green throughout; epithecium dark blue-green, granular; hymenium colourless, 70-110 μm high, containing crystals; paraphyses easily made free in K, mostly simple, c. 1 μm thick at mid-level, the apical cells slightly swollen; hypothecium pale yellow to golden brown. Asci 8-spored, clavate, with an intensely K/I+ blue tholus penetrated by a faintly amyloid, broadly cylindrical axial mass, and a poorly developed ocular chamber, the wall K/I-, surrounded by a K/I+ blue outer layer, approaching the Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid to ovoid, 8-13(-17) x 4-7(-9) μm. Photobiont chlorococcoid. Spot tests: thallus (blastidia) K+ yellow, C+ orange, KC+ orange, P-. Chemistry: 2,7-dichlor-6-O-methylnorlichenxanthone.

Note: a mainly temperate lichen found on base-rich bark of deciduous trees (e.g. Fraxinus), or on nutrient-enriched lignum. For the chemistry see Knoph & Leuckert (1997). It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

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

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: extremely 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 4.0

TSB 15106

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

Herbarium: TSB (15106)
2001/12/12