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, 0.5 mm across, first immersed in thallus, with a convex, black disc and a thin, 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 base, the apical cells slightly swollen; hypothecium 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