Tetramelas triphragmioides (Anzi) A. Nordin & Tibell

Lichenologist, 37: 497 2005. Basionym: Buellia triphragmioides Anzi - Atti Soc. Ital. Sc. Nat. Milano, 11: 171, 1868.
Synonyms: Buellia triphragmia var. lividescens Bagl. & Carestia; Buellia triphragmia var. rugulosa Bagl. & Carestia; Diplotomma triphragmioides (Anzi) Szatala
Distribution: N - TAA (Nascimbene & al. 2006e, 2007b), Lomb (Nordin 1996), Piem (Isocrono & al. 2004), VA (Matteucci & al. 2008c).
Description: Thallus crustose, episubstratic, continuous to areolate-verrucose, pale sulphur yellow to greenish yellow, without a distinct prothallus, usually forming small patches. Medulla white, lacking calcium oxalates, I-. Apothecia lecideine, black, abundant, sessile, 0.2-0.9 mm across, with an often thinly bluish- to grey-pruinose, flat to convex disc, and an initially prominent, finally excluded proper margin. Proper exciple 50-60 µm thick, dark brown in outer part, paler within; epithecium brown, N-; hymenium colourless, not inspersed with oil droplets, 60-70 µm high; paraphyses with swollen, to 7 µm wide, dark-capped apical cells; hypothecium brown, to 150 µm high, N-. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 3-septate, brown, elongate-ellipsoid, sometimes curved, 19-28 x 7-10.5 µm, the walls and septa lacking uneven thickenings, the wall rugulate. Pycnidia rare, black, largely immersed. Conidia bacilliform, 5-7 x 1 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C+ orange, KC+ orange, P-, UV+ orange; medulla K-, C-, KC-, P-. Chemistry: arthothelin and some minor xanthones.
Note: on the smooth bark of Alnus, Populus tremula, Salix, etc., more rarely of conifers; this species is characterised by the yellowish thallus, and the C+reaction. It is included in the Italian red list of epiphytic lichens as “Vulnerable” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: extremely rare
Oromediterranean belt: absent
Montane belt: very rare
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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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence


Title 01139183_02.tif Description Santesson, R. 31544, US National Herbarium Barcode 01139183 Publisher Smithsonian Institution, NMNH, Botany Record license Usage Conditions Apply Identifier http://n2t.net/ar...81d5-3d96e9f99dd2


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_T/Textes_T2/Tetramelas_triphragmioides.htm
France, lac des Sagnes, 1900 m - Alpes-de-Haute-Provence