ITALIC 8.0

Lichinella robusta Henssen

Symb. Bot. Upsal., 18, 1: 73, 1963.

Synonyms:

Distribution: C - Sar (Schultz 2000, Rizzi & al. 2011).

Description: Thallus microfruticose, black, of cylindrical, usually pointed, dichotomously branched, 2-3 mm long, 0.07-0.15 mm thick branches attached by bundles of rhizohyphae, forming regular to irregular, up to 20 mm wide and 4 mm tall cushions which are dispersed to contiguous, but not giving the impression of a rimose-areolate crust. Central part of branches with a distinct, fountain-like, dense hyphal strand consisting 4-5 µm thick hyphae with cylindrical cells, the peripheral parts made up of hyphae with more or less isodiametrical cells, encircling the photobiont cells. Apothecia thallinocarps, terminal on tips of branches, 0.2-0.35 mm across, with a flat to convex or rarely concave, rough disc, and a thin to thick thalline margin. Epithecium discontinuous, 15-20 µm high, with clusters of cyanobacterial cells penetrating in a wedge-like form into the hymenium; hymenium colourless, 70-100 µm high, K/I+ blue, the upper part with groups of photobiont cells intruding between the asci, covered by a more or less continuous layer of sterile thalline tissue; paraphyses stout, 3-4 µm thick, capitate; subhymenium colourless, compact, up to 80 µm high, K/I+ blue. Asci 16-24(-32)-spored, with a thin, one-layered, non-amyloid wall, an amyloid external apical cap, and passive spore discharge via apical rupturing. Ascospores 1-celled, hyaline, globose or subglobose, 5-7 x 4-5 µm. Photobiont cyanobacterial, chroococcoid, of a few cells measuring 5-10 x 6-9 µm, penetrated by haustoria and surrounded by a brownish gelatinous sheath. Spot tests: all negative. Chemistry: without lichen substances.

Note: on steeply inclined surfaces of base-rich siliceous rocks with periodical water seepage after rain; sometimes confused with L. stipatula, but certainly very rare in Italy.

Growth form: Fruticose filamentous

Substrata: rocks

Photobiont: cyanobacteria, coccaceous (e.g. Gloeocapsa)

Reproductive strategy: mainly sexual

On otherwise dry surfaces with short periods of water seepage after rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: very rare

Dry mediterranean belt: 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; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (13755)
2001/12/24