Circinaria caesiocinerea (Malbr.) A. Nordin, Savić & Tibell

Mycologia, 102: 1341, 2010. Basionym: Lecanora caesiocinerea Nyl. ex Malbr. - Lich. Normandie: 320, 1870.
Synonyms: Aspicilia caesiocinerea (Malbr.) Arnold; Aspicilia gibbosa auct. non (Ach.) Körb.; Lecanora gibbosa auct. non (Ach.) Nyl. p.p.
Distribution: N - VG (Castello 2002, Martellos & Castello 2004), Frl (Tretiach & Hafellner 2000), Ven, TAA (Nascimbene 2003, 2008b), Lomb (Valcuvia & al. 2003, Dalle Vedove & al. 2004, De Vita & Valcuvia 2004, Rico & al. 2007, Brackel 2013, Gheza & al. 2015), Piem (Isocrono & al. 2003, 2004, Favero-Longo & al. 2006b, 2015, Isocrono & Ferrarese 2008, Giordani & al. 2014), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999, Valcuvia 2000, Piervittori & al. 2001, 2004, Favero-Longo 2006, Isocrono & al. 2008, Isocrono & Piervittori 2008, Favero-Longo & Piervittori 2009, Blisa & al. 2011, Accattino & al. 2012, Matteucci & al. 2015c), Emil (Benesperi 2009, Fariselli & al. 2020), Lig (Giordani & al. 2016). C - Tosc (Brackel 2015), Marc, Umb (Genovesi 2003b, 2011, Ravera & al. 2006), Laz (Genovesi & al. 2011, Genovesi & Ravera 2014b), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Genovesi & Ravera 2014), Sar (Monte 1993, Rizzi & al. 2011, Giordani & al. 2013, Cossu & al. 2015, Neuwirth 2018, Brackel & Berger 2019). S - Camp (Aprile & al. 2002, Nimis & Tretiach 2004, Catalano & al. 2016), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999), Cal (Puntillo 1996), Si (Poli & al. 1995, 1998, Nimis & al. 1996b, Grillo 1998, Grillo & Caniglia 2004, Brackel 2008b, 2008c).
Description: Thallus crustose, episubstratic, rimose at the edge, otherwise areolate, grey to blue-grey, rarely grey-brown, forming well delimited patches to 20 cm across, sometimes delimited by a dark prothallus. Areoles angular to irregular, flat to convex, (0.2-)0.4-1(-2) mm in diam., contiguous, separated by distinct cracks. Cortex brownish in upper part, sometimes covered by an epinecral layer. Apothecia lecanorine-aspicilioid, (0.1-)0.4-0.8(-1.3) mm across, 1(-5) per areole, round to angular, with a black, concave to flat, epruinose disc with a rough surface, and a rather thick, raised thalline margin. Epithecium olive to olive-brown, without crystals, N+ emerald green, K+ brown; hymenium colourless, (80-)120-150(-200) µm high, I+ wine-red to yellow-green; paraphyses slightly branched and anastomosing, 1.5-2 µm thick, submoniliform in upper part, with globose to subglobose, 4-5 µm wide uppermost cells; hypothecium colourless, I+ persistently blue or partly turning yellow-green. Asci (4-)6(-8)-spored, clavate, the thin outer coat K/I+ blue, the wall and apical dome K/I-. Ascospores 1-celled, hyaline, ellipsoid to subglobose when young, (14-)18-30(-35) x (7-)10-16(-22) µm. Pycnidia with a black, punctiform ostiole. Conidia thread-like, straight, 6-12 x c. 1 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-. Chemistry: aspicilin.
Note: on siliceous rocks wetted by rain, with a wide altitudinal range. Very heterogeneous both morphologically and ecologically, and in need of revision. See also note on Sagedia zonata.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: extremely common
Subalpine belt: extremely common
Oromediterranean belt: very common
Montane belt: common
Submediterranean belt: rather rare
Padanian area: very rare
Humid submediterranean belt: rather common
Humid mediterranean belt: rather rare
Dry mediterranean belt: very 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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P.L. Nimis CC BY-SA 4.0
TSB 34304



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



Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall



P.L. Nimis CC BY-SA 4.0
TSB 10889


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