Lecidea ecrustacea (Arnold) Arnold

Verh. zool.-bot. Ges. Wien, 26: 359, 1876. Basionym: Lecidella polycarpa var. ecrustacea Anzi ex Arnold - Verh. zool.-bot. Ges. Wien, 18: 954, 1868.
Synonyms: Lecidea complicata H. Magn.; Lecidea lactea var. ecrustacea (Arnold) Clauzade & Cl. Roux; Lecidea pseudopilati (Vain.) Vain.
Distribution: N - TAA, Lomb (Anzi Lich. Lang. 399: Hertel 1995, Hertel & Schuhwerk 2010), Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999). C - Sar.
Description: Thallus endosubstratic, not evident or reduced to a few thin granules around the apothecia. Medullary hyphae I+ blue (reaction difficult to observe). Apothecia lecideine, black, with a flat to slightly convex disc, and a thick, wavy proper margin. Proper exciple blue-black in outer part, paler with a violet tinge within, filled with crystals reacting K+ yellow turning red; epithecium green-black; hymenium colourless, 30-40 µm high, I+ blue; paraphyses coherent, c. 3.5 high thick; hypothecium brown-black, K+ reddish brown. Asci 8-spored, narrowly clavate, thick-walled, with a K/I+ pale blue tholus and a strongly amyloid, thin apical cushion, surrounded by a I+ blue outer layer, Lecidea-type. Ascospores 1-celled, hyaline, ellipsoid, (8-)11-13(-15) x 5-6(-7) µm, 1.8-2.4 times as long as wide. Photobiont chlorococcoid. Spot tests: crystals in exciple K+ yellow turning red, P+ yellow. Chemistry: apothecia (exciple) with norstictic acid.
Note: a poorly known silicicolous taxon with optimum above treelline, doubtfully distinct from L. lapicida var. pantherina.
Growth form: Crustose endolithic
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: rather common
Subalpine belt: rather rare
Oromediterranean belt: very rare
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:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples

Einar Timdal, Natural History Museum, University of Oslo, Norway CC BY-SA NC
Sample ID: O-L-175712b Source: http://v3.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=593379


Einar Timdal, Natural History Museum, University of Oslo, Norway – CC BY-SA NC
Herbarium: Sample ID: O-L-175712b
Source: http://v3.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=593379