Byssoloma subdiscordans (Nyl.) P. James

Byssoloma subdiscordans (Nyl.) P. James

Lichenologist, 5: 126, 1971. Basionym: Chiodecton subdiscordans Nyl. - Flora, 62: 221, 1879.

Synonyms: Byssoloma rotuliforme (Müll. Arg.) R. Sant.; Byssoloma tricholomum sensu Lettau non (Mont.) Zahlbr.

Distribution: S - Camp (Puntillo & al. 2000, Puntillo 2000), Cal (Puntillo & Vezda 1994, Puntillo 1995, 1996, 2000, Sérusiaux 1998).

Description: Thallus crustose, thinly episubstratic, ecorticate, minutely granulose-verruculose, 0.2-0.4 mm thick, whitish to greenish grey, continuous or forming more or less orbicular, often confluent, 0.3-2(-4) cm wide patches. Apothecia biatorine, rounded, constricted at base at least when young, 0.2-0.6 mm across, sometimes clustered and then distorted, with a black to bluish black, flat to slightly convex disc surrounded by a pure white, byssoid margin devoid of crystals. Exciple paraplectenchymatous, 20-50 µm wide laterally, 30-40 µm thick at base, not inspersed with crystals; epithecium blackish brown to aeruginose, not inspersed with crystals; hymenium colourless, 40-60 µm high, I+ blue; paraphyses coherent, simple or furcate, c. 1.5 µm thick at mid-level, the apical cells not swollen; hypothecium dark purplish brown, 20-50 µm thick. Asci 8-spored, clavate, with a K/I+ blue apical dome containing a darker blue, tubular ring-structure, and an amyloid coat, Byssoloma-type. Ascospores 3-septate, hyaline, narrowly ellipsoid, slightly tapering at one end, 10-18 x 2.5-5 µm. Pycnidia rare, globose, sessile, up to 0.15 mm across, bluish black, usually with hyaline hairs on the outer wall. Conidia flask-shaped, 4-5 x 1.5-2 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.

Note: a humid subtropical to tropical foliicolous species with isolated outliers in humid parts of the mild-temperate zone; in the Italian stations it was found on leaves of Abies, Buxus and Laurus; to be looked for in the Alps, in montane humid forests, on twigs of conifers. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: leaves

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: extremely 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

Felix Schumm – CC BY-SA 4.0

Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m.
16.07.2008

Domenico Puntillo; Owner: Domenico Puntillo

Italy

Felix Schumm- CC BY-SA 4.0

[18116], Brasilien, Minas Gerais, Serra do Espinhaço, Serra do Caraça, oberhalb des Klosters Caraça, in einem lichten Cerrado. 1450 m, 20°10’ S, 43°30’ W. Leg. K. Kalb und G. Pröbst, 08.07.1978. KALB: LICHENES NEOTROPICI 9.

Felix Schumm- CC BY-SA 4.0

[18116], Brasilien, Minas Gerais, Serra do Espinhaço, Serra do Caraça, oberhalb des Klosters Caraça, in einem lichten Cerrado. 1450 m, 20°10’ S, 43°30’ W. Leg. K. Kalb und G. Pröbst, 08.07.1978. KALB: LICHENES NEOTROPICI 9.

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Felix Schumm – CC BY-SA 4.0

[14163], Portugal, Azoren, Terceira, Lagoa da Falca, 38°43,97' N, 27°17,22' W, ca. 520 m. Leg. Aptroot & Schumm 16.07.2008

Domenico Puntillo - CC BY-SA 4.0

Italia

Domenico Puntillo - CC BY-SA 4.0

Italia

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9414)
2001/11/22

P.L. Nimis CC BY-SA 04

TSB 5221

D. Puntillo CC BY-SA 04

Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Byssoloma_subdiscordans.htm

France, sur feuille de buis - session AFL 2015 - La Chapelle Auzac - Blagour - Lot -

Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Byssoloma_subdiscordans.htm

France, sur feuille de buis - session AFL 2015 - La Chapelle Auzac - Blagour - Lot -

Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Byssoloma_subdiscordans.htm

France, sur feuille de buis - session AFL 2015 - La Chapelle Auzac - Blagour - Lot -

Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_B/Byssoloma_subdiscordans.htm

France, sur feuille de buis - session AFL 2015 - La Chapelle Auzac - Blagour - Lot -

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1161&lang=en

France, forme sur roche Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Abies Huelgoat

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Abies Huelgoat

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Landévennec

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Argol

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Argol

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Argol

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, sur Buxus Argol

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=881&lang=en

France, Landévennec

Felix Schumm - CC BY-SA 4.0

[ABL15445e], Brazil, Rondônia, Sítio Ecológico Buriti on Lago Cujubim E of Porto Velho. 8°35'17'' S, 63°40'40'' W, 100 m. On painted plank in disturbed rain forest. Leg. M. Cáceres & A. Aptroot, (no. 15445e), 18 Nov. 2012, det. A. Aptroot 2012.

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