ITALIC 8.0

Stereocaulon plicatile (Leight.) Fryday & Coppins

Lichenologist, 28: 513, 1996. Basionym: Lecidea plicatilis Leight. - Ann. Mag. nat. Hist., Ser. 4, 4: 201, 1869.

Synonyms: Rhizocarpon plicatile (Leight.) A.L.Sm.; Rhizocarpon rubescens Th.Fr.

Distribution: N - TAA (Dalla Torre & Sarnthein 1902).

Description: Thallus crustose, up to 0.2 mm thick, rimose to areolate, sorediate. Areoles 0.2-0.6 mm wide, confluent to scattered, flat to slightly convex, whitish to grey, rarely a few with darker centres. Soralia 0.2-0.3(-0.4) mm in diam., arising from cracks in the areoles, discrete to confluent, pale green to bluish green or brownish. Apothecia located among the areoles, (0.2-)0.6-1.2(-1.6) mm across, sessile, blackish brown to black, with a flat to slightly convex disc and a very thin, finally sometimes excluded proper margin. Proper exciple brown in outer part, colourless within, with crystals dissolving in K; epithecium brown, K-; hymenium colourless; paraphyses simple, slightly thickened above, with dark cap; hypothecium dark reddish brown. Asci(4-)8-spored, cylindrical-clavate, with a K/I+ blue outer layer and apical dome, and a central, K/I+ darker blue tube, Porpidia-type. Ascospores submuriform or muriform, with 3-7 transverse septa and 1-6 cells with 1 (very rarely 2) longitudinal septum, hyaline, ovoid to fusiform, (20-)24-32 x 10-15 µm, without a distinct perispore. Pycnidia immersed in the areoles, dark reddish brown, globose. Conidia hyaline, filiform, curved 14-18(-22) µm long. Photobiont chlorococcoid. Spot tests: soralia K+ yellow often turning red, C-, KC-, P+ orange, UV-. Chemistry: atranorin, stictic and norstictic acids.

Note: on siliceous rocks and pebbles in damp habitats with a late snow-lie, either on vertical rocks in north-facing slopes or on stones and pebbles near cornice snow beds, near or above treeline; probably restricted to the Alps in Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia (primary); cyanobacteria, filamentous (e.g. Nostoc, Scytonema) (secundary, e.g. in cephalodia)

Reproductive strategy: mainly sexual

Pioneer species

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: absent

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

Herbarium samples

Index Fungorum GBIF

Ulrich Kirschbaum

Central Europe; Germany; Hesse.

P.L. Nimis CC BY-SA 04

TSB 25302

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

Herbarium: TSB (25302)
2001/12/01