Athallia cerinella (Nyl.) Arup, Frödén & Søchting

in Arup & al., Nord. J. Bot., 31: 36, 2013. Basionym: Lecanora cerinella Nyl. - Bull. Soc. Bot. France, 13: 370, 1866.
Synonyms: Callopisma cerinellum (Nyl.) Walt. Watson; Caloplaca cerinella (Nyl.) Flagey; Caloplaca perfida Malme; Candelariella cerinella (Nyl.) Mig. non Zahlbr.; Placodium cerinellum (Nyl.) Vain.
Distribution: N - VG, Frl (Bernini & al. 2010), Ven (Nascimbene & Marini 2010), TAA (De Benetti & Caniglia 1993, Nascimbene & al. 2007b, 2014, Nascimbene 2014), Lomb (Arosio & al. 2000, 2003), Piem (Arosio & al. 1998, Matteucci & al. 2010, Giordani & Malaspina 2016), Emil (Nimis & al. 1996, Sallese 2003, Morselli & Regazzi 2006, Benesperi 2009, Fariselli & al. 2020). C - Tosc (Putortì & al. 1999c, Loppi & al. 2002, Frati & al. 2007, Paoli & al. 2012b, 2013), Marc (Gasparo & al. 1989, Nimis & Tretiach 1999, Frati & Brunialti 2006), Umb (Ravera 1998, Ravera & al. 2006, Brackel 2015), Laz (Bartoli & al. 1997b, Ravera & al. 1999, Munzi & al. 2007, Ravera & Genovesi 2008), Abr (Olivieri & Pacioni 1996, Olivieri & al. 1997, 1997b, Loppi & al. 1999, Nimis & Tretiach 1999, Caporale & al. 2016), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Paoli & al. 2011, 2015), Sar (Zedda 2002, Rizzi & al. 2011, Cossu 2013, Neuwirth 2018). S - Camp (Aprile & al. 2002, 2003, 2003b, Nimis & Tretiach 2004, Garofalo & al. 2010, Catalano & al. 2012, 2016, Brunialti & al. 2013, Ravera & Brunialti 2013), Pugl (Nimis & Tretiach 1999, Brackel 2011, Gianfreda & Matino 2020), Bas (Nimis & Tretiach 1999, Paoli & al. 2006, Potenza & al. 2010), Cal (Brackel & Puntillo 2016), Si.
Description: Thallus crustose, grey to greyish yellow, inconspicuous, up to 0.1 mm thick, forming patches to 5 mm wide. Cortex usually poorly developed, consisting of an amorphous layer or indistinctly paraplectenchymatous; medulla poorly developed. Apothecia frequent, zeorine, often crowded in small groups, usually adnate, round to somewhat irregular, 0.1-0.5 mm across, with a flat to slightly convex, dark yellow to yellow-orange disc, a thick proper margin concolorous with or brighter yellow than disc, and a pale grey to yellow, well-evident to finally excluded thalline margin. Proper exciple 15–30 μm wide; epithecium orange, granular-inspersed, K+ red; hymenium colourless, 70-90 μm high; paraphyses simple to sparingly branched in upper part, 2-2.5 μm thick, the uppermost cells 4-5 μm wide; hypothecium colourless. Asci 12-16-spored, clavate to subcylindrical, Teloschistes-type. Ascospores 1-septate. polarilocular, broadly ellipsoid, 8-13 x 4.5-7 μm, the septum 3-5 μm thick. Pycnidia rare. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ red. Chemistry: thallus without lichen substances; apothecia with parietin (major), fallacinal, emodin, teloschistin and parietinic acid (minor), corresponding with chemosyndrome A of Søchting (1997).
Note: a temperate species found on base- or nutrient-rich bark (e.g. very common on Sambucus or on Juglans in open habitats), with optimum in the submediterranean belt. See also note on A. cerinelloides.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: rare
Submediterranean belt: rather common
Padanian area: rare
Humid submediterranean belt: common
Humid mediterranean belt: rather rare
Dry mediterranean belt: 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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Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (7375)
2001/12/18



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35088)
2002/06/08


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