Lobothallia radiosa (Hoffm.) Hafellner

Acta Bot. Malacitana, 16: 138, 1991. Basionym: Lichen radiosus Hoffm. - Enum. Lich. Eur., tab. 4, 1874.
Synonyms: Aspicilia radiosa (Hoffm.) Poelt & Leuckert; Aspicilia subcircinata (Nyl.) Coppins; Lecanora circinata (Pers.) Ach.; Lecanora radiosa (Hoffm.) Schaer.; Lecanora subcandicans (Müll. Arg.) Stizenb.; Lecanora subcircinata Nyl.; Placodium circinatum (Pers.) Gray; Placodium radiosum (Hoffm.) Ach.; Placodium subcircinatum (Nyl.) Arnold; Psoroma circinatum (Pers.) Rabenh.; Squamaria subcircinata (Nyl.) H. Olivier
Description: Thallus crustose-placodioid, episubstratic, forming up to 6(-8) cm wide, orbicular rosettes, tightly adnate throughout, rimose to areolate in central parts, distinctly lobed at margins, pale to dark grey. Lobes contiguous, 3-7 x 0.4-1(-1.5) mm, c. 0.25 mm thick, sometimes divided and transversely broken by partial cracks, flat to slightly convex, sometimes weakly pruinose at tips. Cortex paraplectenchymatous, of anticlinally arranged hyphae, with abundant, fine, dark brown granules and hyaline, coarsely granular crystals, both insoluble in K; medulla white, with crystals, I-. Apothecia frequent, lecanorine-aspicilioid, mostly crowded in the center of thallus, long remaining immersed, finally adnate, 0.4-1.7 mm across, often compound or confluent and irregular in outline, with a red-brown to black disc and a thin, scarcely raised thalline margin. Epithecium brown to (rarely) olive-brown; hymenium colourless, K/I+ blue; paraphyses usually simple, tightly compacted, with globose, 2-3 µm wide apical cells; hypothecium colourless, subtended by an algal layer. Asci 8-spored, oblong-clavate, the thin outer coat K/I+ blue, the wall and apical dome K/I-. Ascospores 1-celled, hyaline, ellipsoid to broadly ellipsoid, (8-)11-13(-15) x 6-9(-11) µm. Pycnidia appearing as black dots, immersed, the wall colourless in section except in the periostiolar region. Conidia bacilliform, 4-6 x c. 1 µm. Photobiont chlorococcoid. Spot tests: medulla K- or K+ yellow turning red (needle-like crystals), C-, KC-, P- or P+ yellow-orange. Chemistry: medulla without lichen substances or sometimes with norstictic acid, more rarely with stictic acid.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

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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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
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

P.L. Nimis CC BY-SA 4.0
TSB 22863


A. Moro; Owner: Department of Life Sciences, University of Trieste
Sicilia, TP, Isola di Marettimo
2008.04.03


A. Moro; Owner: Department of Life Sciences, University of Trieste
Sicilia, TP, Isola di Marettimo
2008.04.03


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino (Rupingrande)
07.07.2016


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino (Rupingrande)
07.07.2016


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino (Rupingrande)
07.07.2016


Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Val Rosandra, San Lorenzo near Belvedere
11/02/2017


Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Val Rosandra, San Lorenzo near Belvedere
11/02/2017


Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Val Rosandra, San Lorenzo near Belvedere
11/02/2017


Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Val Rosandra, San Lorenzo near Belvedere
11/02/2017


Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Val Rosandra, San Lorenzo near Belvedere
11/02/2017


Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017


Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017


Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017


Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017


Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017


Felix Schumm – CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm – CC BY-SA 4.0
[12290], Griechenland, N-Samos, bei Manolates südlich von Agios Konstandinos, 37°47.185'N, 26°49.533'E, 341 m; halbschattige bis besonnte Terrassenmauern. Leg. Schumm 02.05.2006


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Felix Schumm CC BY-SA 4.0
[16504], Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php . Courtesy: Anita Stridvall


Jennifer Fiorentino
Malta


P.L. Nimis CC BY-SA 4.0
TSB 22863


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Lobothallia_radiosa.htm
France, session AFL Luberon 2009 - Vaucluse - 84


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Lobothallia_radiosa.htm
France, session AFL Luberon 2009 - Vaucluse - 84


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Lobothallia_radiosa.htm
France, session AFL Luberon 2009 - Vaucluse - 84


Marko Doboš
Rimavská Sobota, Banskobystrický, Slovakia


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Karlstadt


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Lauterachtal


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Velo
as Placodium radiosum