Diploicia subcanescens (Werner) Hafellner & Poelt

Herzogia, 5: 59, 1979. Basionym: Buellia subcanescens Werner - Bull. Soc. Hist. Nat. Afrique du Nord, 47: 90, 1956.
Synonyms: Buellia leptina J. Steiner
Distribution: C - Tosc (Brackel 2015), Sar (Rizzi & al. 2011). S - Bas (Potenza 2006, Potenza & al. 2010, Potenza & Fascetti 2012), Cal (Puntillo 1996), Si (Ottonello & Romano 1997, Ottonello & al. 2011).
Description: Thallus crustose-placodioid, glaucous white, often at least partly slightly pruinose at lobe-tipsd, forming 1-5 cm wide, usually orbicular rosettes, sometimes several thalli becoming confluent and covering larger surfaces. Lobes radiating, contiguous, slightly convex, rounded and often slightly broader and fan-shaped at ends, esorediate; lower surface usually pale, attached by medullary hyphae. Upper cortex pseudoparenchymatous, formed by vertically arranged hyphae, filled with minute crystals not dissolving in K; medulla usually white, lax. Apothecia frequent, lecideine, black, to 1 mm across, laminal. Epithecium granular, brown-black, K-; hymenium colourless, hypothecium brown or brown-black. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, brown, thick-walled, ellipsoid, 9-12 x 5-8 µm, Dirinaria-type. Pycnidia laminal, immersed. Conidia hyaline, simple, rod-shaped, 5-8 µm x c. 1 µm. Photobiont chlorococcoid. Spot tests: cortex K+ yellow, C- or C+ fleeting pink, KC+ pale yellow to yellow-orange, P-; medulla K-, C+ fleeting pink, KC+ fleeting pink, P-, UV+ dull orange. Chemistry: cortex with atranorin and often chloroatranorin, medulla with diploicin (major), gyrophoric acid, and other minor compounds.
Note: a southern Mediterranean-Atlantic lichen found on siliceous rocks subject to humid, maritime winds, exclusively Tyrrhenian in Italy. Although there is some molecular evidence (Molina & al. 2002) that this is a synonym of D. canescens, I am not yet convinced (see also Roux & coll. 2014), and I prefer to maintain D. subcanescens as distinct from D. canescens.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: very rare
Dry mediterranean belt: absent


pH of the substrata:

(info)

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5

Solar irradiation:

(info)

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5

Aridity:

(info)

1

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4

5

Eutrophication:

(info)

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4

5

Poleotolerance:

(info)

0

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3

Altitudinal distribution:

(info)

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5




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 (9134)
2002/02/21
apothecia



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9134)
2002/02/21


Caterina Azara; Owner: Caterina Azara
Italy, Sardegna, Bocche di Bonifacio, presso Capo Testa
2010


Caterina Azara; Owner: Caterina Azara
Italy, Sardegna, Bocche di Bonifacio, presso Capo Testa
2010


Caterina Azara; Owner: Caterina Azara
Italy, Sardegna
2010



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot



Felix Schumm – CC BY-SA 4.0
[14271], Portugal, Azoren, SW-Terceira, SW von Sao Sebastiao. Leg. Aptroot & Schumm 11.07.2008, det. Schumm 21.08.08, conf. Aptroot