Chaenotheca stemonea (Ach.) Müll. Arg.
Mém. Soc. Phys. Hist. Nat. Genève, 16: 360, 1862. Basionym: Calicium trichiale var. stemoneum Ach. - K. Vetensk-Acad. Nya Handl., 29: 283, 1808.
Synonyms: Calicium physarellum Ach.; Calicium stemoneum (Ach.) Ach.; Calicium stemoneum var. album Schaer.; Chaenotheca aeruginosa auct. non (Turner) A.L. Sm.; Cyphelium stemoneum (Ach.) De Not.
Description: Thallus crustose thinly episubstratic, farinose, glaucous green. Apothecia stalked, pin-like, 0.7-1.6 mm high. Stalk 0.05-0.09 mm thick, brown to black in lower part, whitish to dull brownish in upper part, of periclinally arranged, medium brown hyphae. Capitulum globose, 0.2-0.3 mm across, with a well-developed, brown mazaedium, the exciple poorly developed, forming a basal collar not visible from above; lower side of exciple paler and apparently brown-pruinose around the mazaedium, due to a hyphal web which tends to trap the brown ascospores; hypothecium brown, with a strongly convex upper surface. Asci short-cylindrical or irregular, formed in chains, dissolving early, with 1-seriately to irregularly arranged spores. Ascospores 1-celled, brown, globose, 3.5-4 µm wide, with a smooth to irregularly and thinly cracked wall. Photobiont chlorococcoid, with rectangular cells (Stichococcus). Spot tests: thallus K-, C-, KC-, P+ yellow to reddish. Chemistry: thallus with barbatic and obtusatic acids.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: extremely rare
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
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13766)
2001/12/05
Juri Nascimbene – CC BY-SA 4.0; Owner: Department of ùLife Sciences, University of Trieste
Paneveggio, Trentino, Italy
Pier Luigi Nimis - CC BY-SA 4.0
TSB 41909
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: extremely rare
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
Current prediction (1981-2010)Future prediction (2071-2100) SSP 1-2.6Future prediction (2071-2100) SSP 5-8.5Predictive maps according to Francesconi et al. 2025
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13766)
2001/12/05
Juri Nascimbene – CC BY-SA 4.0; Owner: Department of ùLife Sciences, University of Trieste
Paneveggio, Trentino, Italy
