Blastenia subathallina (H. Magn.) Arup & Vondrák

( in Vondrák & al.) J. Syst. Evol. 58, 3: 322, 2020.. Basionym: Caloplaca subathallina H. Magn. - Bot. Not.: 82, 1951.
Synonyms:
Distribution: C - Abr (Di Nuzzo & al. 2021, Gheza & al. 2021, Vallese & al. 2022), Sar (Vondrák & al. 2020). S - Si (Vondrák & al. 2020).
Description: Thallus crustose, thinly episubstratic, white to grey-white. Apothecia biatorine, sessile, 0.2-0.4 mm across, with a black, epruinose disc and a thin proper margin. Proper exciple prosoplectenchymatous, brown to grey brown in outer part, colourless within, the pigmented parts K+ violet, N+ orange-red; epithecium grey-brown, K+ strongly violet, N+ orange-red; hymenium colourless, 45-75 µm high, K/I+ blue; paraphyses simple or sparingly branched in upper part, 1-1.5 µm thick at base, the apical cells up to 3 µm wide; hypothecium colourless. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 2-celled, polarilocular, hyaline, ellipsoid, 11-15 x 6-8 µm, the equatorial thickening (“septum”) 4-7 µm; lumina of immature spores sometimes sandglass-shaped. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC- P-. Chemistry: exciple and epithecium with unidentified anthraquinones.
Note: According to Vondrák & al. (2020), this species differs from all other species of the hungarica-group by its chemistry (chlorinated chemosyndrome only). It is known from many stations, mainly in the Mediterranean Region, and is most frequent on twigs of deciduous and coniferous trees and shrubs, with a wide altitudinal range. The only Italian stations are from Abruzzo, Sardinia and the Aeolian Islands, but the species may be more widespread in Mediterranean Italy.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: rare
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
Index Fungorum GBIF

Jan Vondrak https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=32&idx=11454 holotype


Jan Vondrak - Source: https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=32&idx=7640


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Textes_B3/Blastenia_subathallina.htm
France, Aéroport Campo dell' Oro, alt. 5 m - Corse - (20) - sur écorce de ganivelles (clôture de lattes verticales) de Castanea
9/10/2016