Calicium trabinellum (Ach.) Ach.
Meth. Lich. Suppl.: 14, 1803. Basionym: Calicium xylonellum var. trabinellum Ach. - Meth. Lich.: 93, 1803.
Synonyms: Calicium adspersum var. trabinellum (Ach.) Schaer.; Calicium incrustans Körb.; Calicium validiusculum Trevis.
Description: Thallus crustose, endosubstratic and poorly evident or rarely thinly episubstratic and granulose-verrucose, grey-green. Apothecia stalked, pin-like, black with a bright yellow pruina on the lower side of the capitulum and a well-developed, black mazaedium. Stalk black, epruinose, 0.6-0.9 mm high, 0.09-0.13 mm thick, of irregularly interwoven hyphae, the central part dark brown or aeruginose, of heavily sclerotized hyphae, the outer layer covered with a thin, paler, non-amyloid gelatinous sheath. Capitulum lenticular to obovoid, 0.2-0.3 mm across, with a well-developed, cup-shaped exciple of pale (in outer part) or dark (in inner part) cells; hypothecium blackish brown, with a convex upper surface. Asci cylindrical, formed singly, dissolving early, with uniseriately arranged ascospores. Ascospores 1-septate, dark brown, ellipsoid, 10-11 x 5-6 µm, with a thick, ornamented wall; young spores with mainly longitudinal ridges, old spores with irregular cracks and short ridge fragments. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; ascomata I- in all parts. Chemistry: thallus without lichen substances; yellow pruina consisting of vulpinic acid.
Growth form: Crustose
Substrata: lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Current prediction (1981-2010)
Future prediction (2071-2100) SSP 1-2.6
Future prediction (2071-2100) SSP 5-8.5Predictive maps according to Francesconi et al. 2025
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany.
(Coll/ident: Eichler/Cezanne).

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30459)
2008.03.10

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30459)
2008.03.10

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (2710)
2003/03/12

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Felix Schumm - CC BY-SA 4.0
[4812], Schweiz, Kanton Obwälden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, an Fichte.
Blam-Exkursion 06.09.1997. Leg. F. Schumm /Blam Exkursion),
03.10.1997 - Sporen schwarz, 2-zellig, 9.23 x 4.6, 9.23 x 6.5, 11.5 x 5.5,
16 x 8.3 μm; Stiel J-; Apothecien 0,5 mm breit, 1,1 mm hoch; Mazaedium
schwarz hervorquellend, unbereift; Apothecien unterseits am Rd.
gelb bereift; Thallus kaum sichtbar, P-, K rötlich; Asci zylindrisch.

Felix Schumm - CC BY-SA 4.0
[4812], Schweiz, Kanton Obwälden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, an Fichte.
Blam-Exkursion 06.09.1997. Leg. F. Schumm /Blam Exkursion),
03.10.1997 - Sporen schwarz, 2-zellig, 9.23 x 4.6, 9.23 x 6.5, 11.5 x 5.5,
16 x 8.3 μm; Stiel J-; Apothecien 0,5 mm breit, 1,1 mm hoch; Mazaedium
schwarz hervorquellend, unbereift; Apothecien unterseits am Rd.
gelb bereift; Thallus kaum sichtbar, P-, K rötlich; Asci zylindrisch.
Growth form: Crustose
Substrata: lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent
pH of the substrata:
1 | 2 | 3 | 4 | 5 |
Solar irradiation:
1 | 2 | 3 | 4 | 5 |
Aridity:
1 | 2 | 3 | 4 | 5 |
Eutrophication:
1 | 2 | 3 | 4 | 5 |
Poleotolerance:
0 | 1 | 2 | 3 |
Altitudinal distribution:
1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map



Predictive maps according to Francesconi et al. 2025

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany. (Coll/ident: Eichler/Cezanne).

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30459)
2008.03.10

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30459)
2008.03.10

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (2710)
2003/03/12

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=906&lang=en
France, Pyrénées, Font-Romeu

Felix Schumm - CC BY-SA 4.0
[4812], Schweiz, Kanton Obwälden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, an Fichte. Blam-Exkursion 06.09.1997. Leg. F. Schumm /Blam Exkursion), 03.10.1997 - Sporen schwarz, 2-zellig, 9.23 x 4.6, 9.23 x 6.5, 11.5 x 5.5, 16 x 8.3 μm; Stiel J-; Apothecien 0,5 mm breit, 1,1 mm hoch; Mazaedium schwarz hervorquellend, unbereift; Apothecien unterseits am Rd. gelb bereift; Thallus kaum sichtbar, P-, K rötlich; Asci zylindrisch.
