Diploicia subcanescens (Werner) Hafellner & Poelt

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-tips, forming 1-5 cm wide, usually orbicular rosettes, sometimes several thalli merging 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 forming chains in K; medulla usually white, lax. Apothecia frequent, lecideine, black, up to 1 mm across, laminal. Proper exciple thin and becoming excluded with age, brown-black; epithecium granular, brown-black, K-; hymenium colourless, I+blue; paraphyses simple to sparingly branched, the apical cells enlarged, with a dark cap; hypothecium brown or brown-black. Thallus crustose-placodioid, white-pruinose, forming regular rosettes. Upper cortex pseudoparenchymatous, formed by vertically arranged hyphae, filled with minute crystals forming chains in K; medulla usually white, lax. Apothecia lecideine, black, with a finally excluded proper margin. Proper exciple thin, dark brown; epithecium dark brown; hymenium colourless, I+ blue; paraphyses simple or forked the apical cells swollen, with a dark cap; hypothecium dark brown. Asci 8-spored, cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 1-septate, ellipsoid, grey-green to brown, Dirinaria-type, with ontogeny of type B (apical inner wall-thickenings produced before septum formation). Pycnidia immersed, brown-black, the conidiogenous cells enteroblastic, pleurogenous, branched. Conidia hyaline, short-bacilliform. Photobiont chlorococcoid. Chemistry: depsides, sometimes xanthones. Ascospores 1-septate, grey green to brown, thick-walled, ellipsoid, 9-12 x 5-8 µm, Dirinaria-type, with ontogeny of type B (apical inner wall-thickenings produced before septum formation). Pycnidia laminal, immersed. Conidia hyaline, simple, shorth-bacilliform, 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 fully convinced (see also Roux & coll. 2014), and I prefer to maintain D. subcanescens as a distinct species.

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:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

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

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_D/Textes_D1/Diploicia_subcanescens.htm

France, Bonifacio, île Cavallo, alt. 29 m - Corse
5/12/2014

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