Rehmia petraea (Wulfen) E.J. Möller, Timdal, Haugan & Bendiksby
Fungal Syst. Evol, 16: 224, 2025. Basionym: Lichen petraeus Wulfen - Schr. Ges. naturf. Fr. Berlin, 8: 89, 1787.
Synonyms: Buellia concentrica auct.; Lecidea carphina Ach.; Lecidea excentrica (Ach.) Röhl.; Lecidea petraea (Wulfen) Ach.; Rhizocarpon concentricum auct. non (Davies) Beltr.; Rhizocarpon excentricum (Ach.) Arnold; Rhizocarpon perlutum auct. non (Nyl.) Zahlbr.; Rhizocarpon petraeum (Wulfen) A. Massal.; Rhizocarpon petraeum f. albicans (Körb.) Jatta; Rhizocarpon petraeum f. dealbatum A. Massal.; Rhizocarpon petraeum f. lapicida A. Massal.; Rhizocarpon petraeum f. orbiculare A. Massal.; Rhizocarpon petraeum var. subconcentricum Körb.; Rhizocarpon subconcentricum (Körb.) Körb.; Rhizocarpon variegatum J. Steiner
Distribution: N - VG, Frl, Ven (Caniglia & al. 1999, Lazzarin 2000b), TAA (Nascimbene 2001b, 2003, 2005b, 2006c, Nascimbene & al. 2022), Lomb, Piem (Isocrono & al. 2004, Favero-Longo & al. 2004, 2006b), VA (Piervittori & Isocrono 1999, Isocrono & al. 2008, Favero-Longo & Piervittori 2009), Emil (Dalle Vedove & al. 2002, Fariselli & al. 2020), Lig. C - Tosc, Marc, Umb (Ravera & al. 2006), Laz, Abr (Nimis & Tretiach 1999), Sar (Rizzi & al. 2011, Giordani & al. 2013). S - Camp (Ricciardi & al. 2000, Aprile & al. 2003, 2003b, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas, Cal (Puntillo 1996), Si.
Description: Thallus crustose, cracked to slightly areolate towards the center, white to pale grey, pruinose, the pruina 10-60 mm thick (when eroded, thallus surface grey to brown), forming orbicular, up to 5 cm wide patches, sometimes delimited by a thin dark prothallus. Areoles angular, flat to slightly convex, c. 0.5 mm wide. Medulla white, I-, with crystals of calcium oxalates. Apothecia lecideine, black, (0.3-)0.5-1(-1.4) mm across, often arranged in concentric circles, innate, angular to oval, with an initially flat, then convex, rough, epruinose disc and an up to 0.2 mm thick, persistent proper margin which is paler in colour and often tinged with blue or green, sometimes white-pruinose. Proper exciple dark blue-green in outer part, colourless to pale brown in inner part, containing crystals; epithecium olive-brown, with crystals dissolving in K, K+ yellow; hymenium colourless, (125-)160-240(-275) µm high; paraphysoids slender, scarcely swelling at apex, without a strongly delimited pigmented cap; hypothecium dark brown, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus that is K/I- in lower part and K/I+ blue near the apex, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, with (11-)13-21(-30) cells in optical view, hyaline, ellipsoid, (32-)35-45(-50) x (12-) 15-22(-30) µm, halonate. Photobiont chlorococcoid. Spot tests: medulla K+ yellow, C-, KC-, P+ orange. Chemistry: stictic acid.Note: a widespread, holarctic pioneer species of base-rich siliceous rocks, often found on roofing tiles and on slightly calciferous sandstone, with a wide altitudinal range.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: very rare
Oromediterranean belt: very rare
Montane belt: rather rare
Submediterranean belt: rare
Padanian area: extremely rare
Humid submediterranean belt: rare
Humid mediterranean belt: very rare
Dry mediterranean belt: extremely rare
Predictive model
Herbarium samples
Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (29124)
2001/12/10
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (29124)
2001/12/10
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_petraeum.htm
France
Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Miche David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Port Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pointe de Kerdra
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pointe de Dinan
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein.
Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM
Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6
μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein.
Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM
Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6
μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein.
Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM
Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6
μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein.
Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM
Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6
μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km
SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein.
Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM
Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6
μm, hyalin, muriform.
Wolfgang von Brackel - CC BY-4.0
Italy, N Apennines, Passo la Calla
Wolfgang von Brackel - CC BY-4.0
Italy, N Apennines, Passo la Calla
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, Friuli Venezia Giulia, ad saxa circa Pontebam. 1855
as Rhizocarpon petraeum
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, n op. Auronzo 1855
as Rhizocarpon petraeum concentricum
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. Postumano
as Rhizocarpon petraeum orbiculare
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: extremely rare
Subalpine belt: very rare
Oromediterranean belt: very rare
Montane belt: rather rare
Submediterranean belt: rare
Padanian area: extremely rare
Humid submediterranean belt: rare
Humid mediterranean belt: very rare
Dry mediterranean belt: extremely rare
Predictive model
| Herbarium samples |
DOLICHENS
Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (29124)
2001/12/10
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (29124)
2001/12/10
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_petraeum.htm
France
Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Lostmarc'h
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Miche David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Port Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pont Croix
Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pointe de Kerdra
Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, Pointe de Dinan
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=169&lang=en
France, L'Aber
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
SE-Europe; N-Cyprus; SE of Girne; Beşparmak Mountains; between Girne Kayasi and Armenian Monastery (Sourp Margar)
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Marta González Garcia - Centro de Estudios Micologicos Asturianos
Spain, Murias (Aller-Asturias), 12-I-2023, en rocas ácidas.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein. Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6 μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein. Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6 μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein. Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6 μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein. Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6 μm, hyalin, muriform.
Felix Schumm - CC BY-SA 4.0
[4814], Schweiz, Kanton Obwalden, oberes Grossschliertal (ca. 8 km SW Sarnen), 2-3 km NO Schwendi Kaltbad, ca. 1400 m, Kalkstein. Leg. O. Dürhammer & U. Schwarz & F. Schumm, 06.09.1997 (BLAM Exkursion), det. F. Schumm, 16.04.1998. - Sporden 22.2-32.3 x 13.6 μm, hyalin, muriform.
Wolfgang von Brackel - CC BY-4.0
Italy, N Apennines, Passo la Calla
Wolfgang von Brackel - CC BY-4.0
Italy, N Apennines, Passo la Calla
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, Friuli Venezia Giulia, ad saxa circa Pontebam. 1855
as Rhizocarpon petraeum
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, n op. Auronzo 1855
as Rhizocarpon petraeum concentricum
