Opegrapha lithyrga Ach.

Lichenogr. Univ.: 247, 1810.
Synonyms: Opegrapha lithyrgodes Nyl. ex Leight.
Description: Thallus crustose, thin and poorly developed, smooth and film-like or rarely granular, grey, olive-brown, grey-brown, rarely rusty brown. Apothecia lirelliform, black, solitary or in small clusters, round, ellipsoid or more commonly sinuous-elongate, simple or sometimes branched, (0.1-)0.5-1.5(-2) x (0.07-)0.1-0.2(-0.25) mm, 50-80 µm tall, with a slit-like, epruinose disc, and a thick, persistent, epruinose proper margin. Proper exciple black, carbonized, continuous below the hypothecium, 13-18 μm thick laterally and 40-60 μm at the base, K+ greenish; epithecium brownish; hymenium colourless, 60-80 μm high, I+ reddish; paraphysoids branched and anastomosing, c. 1 μm thick, the apical cells hardly swollen; subhymenium grey-brown, I+ reddish. Asci 8-spored, cylindrical-clavate, the inner layer of the endoascus amyloid throughout, the apical ring hardly visible (Vulgata-type), 40-60 x 15-18 µm. Ascospores 5-7-septate, hyaline, fusiform, straight or slightly curved, 20-35 x (2.5-)3-5 μm, with a 1-1.5 μm thick, gelatinous perispore. Pycnidia black, very small, sunken in thallus. Conidia straight, bacilliform and 3-5 x c. 1 μm, or filiform, curved, and 10-14 x c. 0.5 μm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent

pH of the substrata:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Rarity

absent
extremely rare
very rare
rare
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rather common
common
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extremely common
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Occurrence data
Predictive map

D. Puntillo CC BY-SA 4.0


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (23285)
2001/11/27


P.L. Nimis CC BY-SA 4.0
TSB 41448


Domenico Puntillo; Owner: Domenico Puntillo
Italy


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1023&lang=en
France, Landevennec


Felix Schumm - CC BY-SA 4.0
[ABL27934], Brazil, Santa Catarina, São Francisco do Sul, S of Prainha. 26°14'06'' S, 48°30'05'' W, 10 m. On coastal granite. Leg. M. Cáceres & A. Aptroot (no 27934), 8 October 2015, det. A. Aptroot 2015.


Felix Schumm - CC BY-SA 4.0
[ABL27934], Brazil, Santa Catarina, São Francisco do Sul, S of Prainha. 26°14'06'' S, 48°30'05'' W, 10 m. On coastal granite. Leg. M. Cáceres & A. Aptroot (no 27934), 8 October 2015, det. A. Aptroot 2015.