ITALIC 8.0

Protoparmelia hypotremella Herk, Spier & V. Wirth

in Aptroot & al., Lichenologist, 29: 416, 1997.

Synonyms:

Distribution:

Description: Thallus crustose, pale brown to pale olivaceous brown, consisting of squamulose granules, paler along the margins of the granules/areoles, without discernible thallus below or around the granules, usually covering large surfaces. Granules convex, rounded to elongate or globose, c. 0.2 mm wide; microsquamules randomly occur amongst the granules, crenate to lobate, slightly concave to convex, up to 0.3(-0.6) mm wide, sometimes bearing dark-tipped isidia-like granules the margins often eroding and less distinctly corticate, often whitish, paler than surface. Epicortex 5-10 µm thick, hyaline; cortex 15-25 µm thick, pale brown, paraplectenchymatous, the cell lumina c. 6-9 µm wide; medulla 60-150 µm thick, rather loose. Apothecia very rare, lecanorine, up to 1 mm across, dark brown to dark yellowish brown, with a more or less flat disc and a distinct thalline margin. Asci 8-spored, clavate, approaching the Lecanora-type, with a well-developed amyloid tholus and a distinct, non-amyloid axial mass. Ascospores 1-celled, hyaline, usually poorly developed. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C- or C+ pale yellow, KC- or KC+ pink, P-, UV+ white. Chemistry: lobaric acid (major), and minor unknowns.

Note: on bark and wood, both in forests and in rural landscapes; widespread in Europe from the lowlands to subalpine coniferous forests, but easily overlooked; known from several localities in the Alps, outside the Italian territory; to be looked for in Italy.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

pH of the substrata:

1

2

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5

(info)

Solar irradiation:

1

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5

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Aridity:

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5

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Index Fungorum GBIF

Jurga Motiejūnaitė

A-microsquamulose thallus (brown squamules with paler margins)

Jurga Motiejūnaitė

B, C-isidia-like granules.

Jurga Motiejūnaitė

B, C-isidia-like granules.