ITALIC 8.0

Euopsis pulvinata (Schaer.) Vain.

Meddeland. Soc. Fauna Fl. Fenn., 6: 85, 1881. Basionym: Lecidea pulvinata Schaer. - Naturwiss. Anz., 2: 11, 1818.

Synonyms: Blennothallia haemalea (Sommerf.) Trevis.; Collema haemaleum Sommerf.; Pannaria haemalea (Sommerf.) A. Massal.; Pyrenopsis haemalea (Sommerf.) Norrl.; Pyrenopsis macrocarpa E. Dahl; Pyrenopsis pulvinata (Schaer.) Hellb.

Distribution: N - TAA (Nascimbene & al. 2022).

Description: Thallus subcrustose to small-squamulose, homoiomerous, subgelatinous when wet, ecorticate, uniformly dark reddish brown, to 0.3(-0.5) mm thick, forming up to 2 cm wide patches. Thallus anatomy paraplectenchymatous, the hyphae forming a large-celled network around the cyanobacteria. Apothecia formed in a tangle of generative hyphae, to 1 mm across, adnate, with a flat to convex, red-brown, often glossy disc, and a crenulate-squamulose thalline margin containing cyanobacteria. Thalline exciple c. 150 μm thick; proper exciple thin, 10-25 μm wide, of parallel hyphae; epithecium brownish; hymenium colourless, 100-150 μm high, I-, K/I-; paraphyses slender, sparingly branched, septate, gelatinized, not swollen at tips; hypothecium brownish, 70-90 μm high. Asci 8-spored, cylindrical, unitunicate, the wall composed of an outer, non-expansible and an inner, expansible layer surrounding the protoplast as an amyloid collar, which expands during spore release into a long, tapering rostrum, the outer wall layer strongly amyloid, its upper part separated from the expanded amyloid rostrum by a non-amyloid zone. Ascospores 1-celled, hyaline, ellipsoid, 9-15(-17) x (4-)5-8 μm. Pycnidia rare, immersed in warts. Conidia bacilliform, 4-5 x c. 1 μm. Photobiont cyanobacterial, chroococcoid (Gloeocapsa), surrounded by a reddish (in outer parts) to colourless (in inner parts) gelatinous sheath. Spot tests: thallus K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: a cool-temperate to boreal-montane, perhaps circumpolar lichen found on siliceous rocks, especially in seepage tracks on small pebbles in wet places, sometimes even on soil, usually in upland areas; much overlooked, and probably more widespread in the Alps.

Growth form: Crustose

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: extremely rare

Subalpine belt: very 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

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5

(info)

Solar irradiation:

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5

(info)

Aridity:

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5

(info)

Eutrophication:

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5

(info)

Poleotolerance:

0

1

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3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Index Fungorum GBIF

Curtis Randall Björk – CC BY-SA 4.0

British Columbia, Boundary Ranges Date: 2013-07-02 On alpine cliff

Author: Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php