Acarospora fuscata (Schrad.) Arnold
Flora, 53: 469, 1870. Basionym: Lichen fuscatus Schrad. - Spicil. Fl. Germ., 1: 83, 1794 nom. cons. prop.
Synonyms: Acarospora fuscata var. minutissima Bagl.; Acarospora monacensis H. Magn.?; Acarospora nigrocastanea Hue; Acarospora photina A. Massal.; Acarospora rufoalutacea Harm. ex H. Magn.?; Acarospora smaragdula sensu A. Massal. et auct. ital. p.p.; Lecanora cervina var. squamulosa (Schrad.) Willey
Description: Thallus crustose, episubstratic, areolate, often forming extensive, up to 10 cm wide patches. Areoles 0.2-2(-3) mm wide, up to 1 mm thick, mostly contiguous, irregular in outline, usually flat and uneven, epruinose, pale to reddish brown, often with black margins and undersides. Epicortex thin (< 10 μm thick) or absent; cortex 25-35(-50) µm thick, yellow-brown in uppermost part, otherwise colourless, paraplectenchymatous, with perpendicularly arranged cells and crystals visible under polarized light; algal layer continuous, 50-100 μm thick; medulla white, 0.1-0.8 mm thick, of intricate, thin-walled hyphae. Apothecia 1-5(-10) per areole, 0.1-0.4(-1) mm across, at first punctiform, later slightly expanded, with a concave to flat, usually angular or irregular, immersed, smooth to rough, reddish brown to blackish disc, and an inapparent thalline margin. Proper exciple distinct, 10-20(-30) μm wide, not expanding around the disc; epithecium brownish, 10-15 μm high; hymenium colourless, (70-)100-120(-140) μm high, hemiamyloid, IKI+ red or blue turning red; paraphyses coherent, mostly simple, (1-)1.5-2 μm thick at mid-level, the apical cells barely expanded or 2-4 μm wide; subhymenium 30-60 μm high, IKI+ blue (euamyloid); hypothecium 10–20 μm high. Asci 100-200-spored, clavate, the apical dome K/I-, 60-90 x 15-18 μm. Ascospores 1-celled, hyaline, narrowly ellipsoid to subcylindrical, 4-5(-6) x (1-)1.5-2 μm. Pycnidia immersed, the conidiogenous cells ampulliform. Conidia 1-2 x 0.5-1 μm. Photobiont chlorococcoid. Spot tests: cortex K-, C+ red, KC+ red, P-, UV-; medulla C-, KC-. Chemistry: cortex with gyrophoric acid.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: rather rare
Subalpine belt: rather rare
Montane belt: rare
Dry submediterranean belt: rather rare
Humid submediterranean belt: rather 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 1-2.6
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 (35221)
2001/12/12
Felix Schumm – CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Domenico Puntillo; Owner: Domenico Puntillo
Italy, Herb. Puntillo 4615
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Felix Schumm – CC BY-SA 4.0
[2636], Germany, Baden-Württemberg, Zollernalbkreis, an Kalkfelsen beim Lochenstein nahe Balingen, ca. 900 m, leg. et det. Schumm 26.06.1978.
Felix Schumm – CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33464)
2001/12/12
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Pier Luigi Nimis CC BY-SA 4.0
TSB 41696
Pier Luigi Nimis CC BY-SA 4.0
TSB 41606
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38642
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38643
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38642
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Pointe du Millier
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Pointe du Millier
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Trez Bihan
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On siliceous rocks (Grauwacke) and Basalt (lower image).Thallus K-, C+ red, KC+ red; Pd-.Central Europe; Germany; Hesse.
Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/ - Courtesy: Anita Stridvall
Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/ - Courtesy: Anita Stridvall
Wolfgang von Brackel - CC BY 4.0
Germany, Bavaria., ., .
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: rather rare
Subalpine belt: rather rare
Montane belt: rare
Dry submediterranean belt: rather rare
Humid submediterranean belt: rather 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 (35221)
2001/12/12
Felix Schumm – CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Domenico Puntillo; Owner: Domenico Puntillo
Italy, Herb. Puntillo 4615
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
Felix Schumm – CC BY-SA 4.0
[2636], Germany, Baden-Württemberg, Zollernalbkreis, an Kalkfelsen beim Lochenstein nahe Balingen, ca. 900 m, leg. et det. Schumm 26.06.1978.
Felix Schumm – CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33464)
2001/12/12
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Felix Schumm CC BY-SA 4.0
[16527], Germany, Baden-Württemberg, Schwarzwald-Baar-Kreis, an der Straße von Hornberg nach Schramberg, Abbiegung Käppelehof. 48,22853° N, 8,31805° E, 670 m. An Granitfelsen. Leg. et det. Schumm 07.07.2010.
Pier Luigi Nimis CC BY-SA 4.0
TSB 41696
Pier Luigi Nimis CC BY-SA 4.0
TSB 41606
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38642
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38643
Pier Luigi Nimis - CC BY-SA 4.0
TSB 38642
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Courtesy Danièle et Olivier Gonnet - https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_A/Acarospora_fuscata.htm
France, Carrière du Paradis, Mont Cenis - Savoie
25/10/2016
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Pointe du Millier
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Pointe du Millier
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France, Trez Bihan
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=222&lang=en
France
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
On siliceous rocks (Grauwacke) and Basalt (lower image).Thallus K-, C+ red, KC+ red; Pd-.Central Europe; Germany; Hesse.
Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/ - Courtesy: Anita Stridvall
Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/ - Courtesy: Anita Stridvall
