ITALIC 8.0

Lecanora rhizinata Poelt, Barreno & V.J. Rico

Lazaroa, 5: 255, 1983.

Synonyms:

Distribution: C - Sar.

Description: Thallus crustose-subsquamulose, episubstratic, 5-30 mm wide, yellowish green, rarely yellowish brown in sun-forms, often with pinkish patches in the damaged parts, the areoles/squamules 0.5-3.5 x 0.6-2.4 mm, 0.5-1 mm thick, umbilicate, usually lobed, concave to convex, at first smooth, but soon turning rugose; lower surface at first whitish, then brown to black, with branched, up to 10 mm long, 0.1-0.4 mm wide, blackish, pale brown to pinkish rhizinose strands. Upper cortex 90-380 μm thick, prosoplectenchymatous, the upper part 30-60 μm thick, yellowish brown, filled with 0.5-4 x 0.5-1.5 μm large crystalline granules, with an epinecral layer, lower part colourless, without granules; algal layer discontinuous; medulla 30-45 μm thick, prosoplectenchymatous; lower cortex absent. Apothecia lecanorine, 1-4.5 mm across, often covering a large part of thallus, at first semi-immersed, then sessile and constricted at base to subpedicellate, with a slightly concave to slightly convex, yellowish brown to brown disc and a persistent, often flexuose thalline margin. Thalline exciple 500-650 μm thick laterally, corticate, the outer part filled with crystals; proper exciple 15-20 μm thick; epithecium yellowish brown, 10-15 μm high, with small crystals (0.5-4 x 0,5-1.5 μm); hymenium colourless, 45-60 μm high, the upper part with sparse small crystals; paraphyses strongly coherent, sparingly branched and anastomosing, 1.5-2 μm thick at mid-level, the apical cells 3-4.5 μm wide; hypothecium 70-135 μm high, prosoplectenchymatous. Asci 8-spored, 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 blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid to broadly ellipsoid, rather thick-walled (8-)9.5-12.5(-14.5) x (4.5-)5-7(-7.5) μm. Pycnidia colourless, immersed. Conidia needle-like, slightly curved, 17-28 x 0.5-1 μm. Photobiont chlorococcoid. Spot tests: cortex and apothecial margin K- or K+ pale yellow, C-, KC+ pale yellow, P-; medulla K-, C-, KC-, P-; pinkish parts K + reddish violet. Chemistry: usnic acid, plus an unidentified pigment in the pink-coloured parts.

Note: a very rare species growing on easily exfoliable metamorphic rocks in open, wind-exposed and snow-free sites in upland areas, reported from Central Spain, Southern France and Sardinia. For further details see Poelt & al. (1983) and Roux (2009).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: extremely rare

Montane belt: extremely rare

Submediterranean belt: absent

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

INDEX FUNGORUM GBIF

Felix Schumm - CC BY 4.0

[VZ2117], Hispania. Prov. Segovia: Sierra de Ayllón. Pico del Lobo, 1975 m, prope locum typi. In fissuris ad parietes rupium schistosarum. Leg. V. J. Rico, 22.9.1985. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 2117.

Felix Schumm - CC BY 4.0

[VZ2117], Hispania. Prov. Segovia: Sierra de Ayllón. Pico del Lobo, 1975 m, prope locum typi. In fissuris ad parietes rupium schistosarum. Leg. V. J. Rico, 22.9.1985. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 2117.

Pier Luigi Nimis - CC BY-SA 4.0

Herbarium: TSB 8203

P.L. Nimis CC BY-SA 04

TSB 8203

P.L. Nimis CC BY-SA 4.0

TSB 8203

P.L. Nimis CC BY-SA 04

TSB 8203

Detail from: https://gzu.jacq.org/GZU000290845

GZU000290845 - Collector Barreno,E. & Rico,V.J. s.n. Date 1981-09-05 Location Spain / Castilla y León Label Prox. Pico del Lobo (Sierra de Ayllón, Segovia) ; Alt. 2230 m Habitat En grieta, cerca de saliente, exp. W. Esquistos Annotations GZU I