Buellia erubescens Arnold

Verh. zool.-bot. Ges. Wien, 25: 493, 1875.
Synonyms: Buellia jorgei Samp.; Buellia zahlbruckneri J. Steiner non sensu T. Schauer
Distribution: C - Tosc (Benesperi & al. 2007), Umb (Ravera 2000, Ravera & al. 2006), Laz (Ruisi & al. 2005), Mol (Nimis & Tretiach 1999, Caporale & al. 2008). S - Camp (Garofalo & al. 1999, 2010, Aprile & al. 2003b), Cal (Puntillo 1996, Incerti & Nimis 2006).
Description: Thallus crustose, episubstratic, smooth to rimose, white to whitish grey, often delimited by a black prothalline line. Medulla white, lacking calcium oxalates, I- Apothecia lecideine, black, (0.3-)0.5-1.2(-1.6) mm across, sessile, with a flat to convex, often pruinose disc, and an initially thick, later thinner and finally excluded proper margin. Proper exciple well developed, 80-125 μm wide in lower part, brown throughout, Dispersa-type, of radially arranged hyphae, the inner part of long-celled, parallel, strongly agglutinated and thick-walled hyphae, the outer part of short-celled, isodiametric hyphae without intercellular spaces, N-, K+ yellow or K+ yellow then red (red crystals); epithecium brown, N-, in pruinose specimens inspersed with crystals reacting K+ red; hymenium colourless, not inspersed with oil droplets, (80-)100-110 µm high; paraphyses simple to sparingly branched, the apical cells slightly swollen, 2-4 μm wide, with a dark cap. 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 1-septate, not constricted at septum, brown, ellipsoid to broadly ellipsoid with rounded apices, not curved, (10-)13-18(-20) x (6-)7-8.5(-9.5) µm, Physconia-type when young, Buellia-type when mature, with a rough to faint microrugulate ornamentation. Pycnidia rare, black, immersed. Conidia bacilliform, 6-9 x 0.5-1 µm. Photobiont chlorococcoid. Spot tests: K+ yellow or K+ yellow-orange turning red, C-, KC-, P- or P+ faintly yellow, UV-. Chemistry: chemotype 1) atranorin, norstictic and connorstictic acids, plus traces of salazinic and hyposalazinic acids, zeorin and an unknown secalonic acid derivative; chemotype 2) atranorin, traces of norstictic and connorstictic acids, and of a secalonic acid derivative.
Note: on acid and smooth bark in warm-humid areas. All earlier records of this species from upland areas of the Alps and of the Northern Apennines (see Nimis 1993: 138) are attributed to Tetramelas chloroleucus following Giralt & al. (2000); some records could refer to the recently-described B. iberica. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: very rare
Humid mediterranean belt: very 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 DOLICHENS


E. Pittao CC BY-SA 4.0
TSB 12164



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (26662)
2008.03.31



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33232)
2008.03.31



Juri Nascimbene - CC BY-SA 4.0
Paneveggio, Reg. Trentino-Alto Adige Prov. Trento, Italy.



Juri Nascimbene - CC BY-SA 4.0
Paneveggio, Reg. Trentino-Alto Adige Prov. Trento, Italy.



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12164)
2008.03.31


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On Juglans regia. Portugal; NW-Madeira; ese of Boca da Encumeada: Ribeira do Poço (Grass Bridge).


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On Juglans regia. Portugal; NW-Madeira; ese of Boca da Encumeada: Ribeira do Poço (Grass Bridge).


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On Juglans regia. Portugal; NW-Madeira; ese of Boca da Encumeada: Ribeira do Poço (Grass Bridge).


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On Juglans regia. Portugal; NW-Madeira; ese of Boca da Encumeada: Ribeira do Poço (Grass Bridge).



Felix Schumm - CC BY-SA 4.0
[VZ1814],URSS. Caucasus Magnus, regio montis Elbrus. Baksan, in valle torrentis Adyrsu, 1850 m. Ad ramulos Pino silvestris in ripa torrentis. Leg. V. Vašák et A. Vezda, 25.6.1980. Ex A. Vezda Lichenes Selecti Exsiccati Nr. 1814 as Buelia zahlbruckneri



Felix Schumm - CC BY-SA 4.0
[VZ1814],URSS. Caucasus Magnus, regio montis Elbrus. Baksan, in valle torrentis Adyrsu, 1850 m. Ad ramulos Pino silvestris in ripa torrentis. Leg. V. Vašák et A. Vezda, 25.6.1980. Ex A. Vezda Lichenes Selecti Exsiccati Nr. 1814 as Buelia zahlbruckneri