ITALIC 8.0

Lecidea obluridata Nyl.

Flora, 56: 201, 1873.

Synonyms: Lecidea nigrogrisea Nyl.

Distribution: N - Piem (Isocrono & al. 2003, Gheza & Nascimbene 2024). C - Sar. S - Si (Brackel 2008c).

Description: Thallus crustose, episubstratic, grey-brown or pale brown, more or less shiny, often delimited by a black prothallus, areolate, the areoles concave to flat, often whitish at margins, 0.2-1.6 mm wide. Medulla white, I-. Apothecia lecideine, black, epruinose, arising between the areoles, round to angular in outline, (0.3-)0.5-1(-1.6) mm across, at first adnate then subsessile, with a flat to slightly convex disc and a thin, sometimes flexuose, persistent or finally excluded proper margin. Proper exciple thin, brown-black at least in outer part, K-; epithecium blackish green, with crystalline granules, K+ intensifying green, N+ deep purple-red; hymenium colourless, (40-)50-65(-75) µm high; paraphyses simple or sparingly branched in upper part, coherent, the apical cells slightly swollen, up to 3 µm wide; hypothecium medium to dark brown, K+ deep reddish brown. Asci 8-spored, clavate, Lecidea_type. Ascospores 1-celled, hyaline, broadly ellipsoid, (7-)9-11(-12) x (3.7-)4-5(-6) µm, 2.3-2.8 times as long as wide. Pycnidia black. Conidia short-bacilliform, 5-8 µm long. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC-, P-; medulla K+ faintly yellow, C-, KC-, P-, UV-. Chemistry: medulla with confluentic acid.

Note: a rather poorly known silicicolous species based on a type from low elevation in the Pyrenees, with several records in Western and Central Europe, and across the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: very rare

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

S. Poumarat http://mycologie.catalogne.free.fr/lichens.htm

S. Poumarat - Source: http://mycologie.catalogne.free.fr/lichens.htm