Stereocaulon nanodes Tuck.

Stereocaulon nanodes Tuck.

Am. J. Sc. Arts, 2, 28: 201, 1859.

Synonyms: Stereocaulon carinthiacum Frey; Stereocaulon hypopetraeum Vain. & Räsänen; Stereocaulon nanodes f. tyroliense (Nyl.) I.M. Lamb; Stereocaulon tyroliense Nyl.

Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Nascimbene 2002), TAA (Nascimbene 2003, Bilovitz & al. 2014b, Nascimbene & al. 2022), Lomb (Nascimbene 2006), Piem (TSB 33837).

Description: Primary thallus persistent, squamulose, consisting of 1-2(-5) mm tall, ascending to erect, flattened, grey, at first fan-shaped, later irregularly branched in one plane phyllocladia, which may be scattered or form swards, the lower surface sorediate. Pseudopodetia rarely present, up to 1 cm tall, flattened, sparsely branched, whitish-green, blackish at base, covered with farinose soredia on the lower side of branches. Cephalodia infrequent, bluish-grey, containing Stigonema, located both among the basal phyllocladia and on the pseudopodetia. Apothecia very rare, dark brown. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless; paraphyses simple, slightly thickened above, with a dark cap; hypothecium colourless. Asci 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 septate, hyaline, fusiform. Main photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC+ violet (reaction often difficult to observe macroscopically, best evident on acetone extract on filter paper!), P- or P+ slowly pale yellow, UV+ blue-white. Chemistry: atranorin and variable amounts of lobaric acid.

Note: an arctic-alpine to boreal-montane, circumpolar lichen found on mineral-rich rocks, also under overhanging faces, on pebbles and large boulders, often on metal-rich substrata and in rather disturbed habitats in upland areas, reaching the nival belt; certainly more widespread in the Alps.

Growth form: Fruticose

Substrata: rocks

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

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Species of metal-rich rocks

Pioneer species

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather rare

Oromediterranean belt: absent

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

Herbarium samples

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

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

Herbarium: TSB (3374)
2001/12/07

Pier Luigi Nimis - CC BY-SA 4.0

TSB 37419

Pier Luigi Nimis - CC BY-SA 4.0

TSB 37419

Pier Luigi Nimis CC BY-SA 4.0

TSB 41162

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.

as S. carinthiacum

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.

as S. tyroliense

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, Ergue Gaberic

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, Ergue Gaberic

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

France, St. Cadou

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

Belgium, Monthermé

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

Belgium, Monthermé

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

Belgium, Monthermé

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=992&lang=en

Belgium, Monthermé

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