Mycobilimbia sphaeroides (Dicks.) S. Ekman & Printzen

Mycobilimbia sphaeroides (Dicks.) S. Ekman & Printzen

in Cannon & al., Revisions of British and Irish Lichens, 11: 76, 2021. Basionym: Lichen sphaeroides Dicks. - Fasc. Pl. Crypt. Brit., 1: 9, 1785

Synonyms: Bacidia sphaeroides (Dicks.) Zahlbr.; Biatora pilularis (Körb.) Hepp; Biatora sphaeroides (Dicks.) Hornem.; Biatorina pilularis Körb.; Biatorina sphaeroides A. Massal.; Bilimbia sphaeroides (Dicks.) Körb.; Catillaria sphaeroides (A. Massal.) Schuler non auct.; Mycobilimbia pilularis (Körb.) Hafellner & Türk

Distribution: N - VG, Frl, Ven, TAA (Nascimbene & al. 2007b, 2022, Nimis & al. 2015), Lomb, Piem (Isocrono & al. 2004), Lig. C - Tosc, Umb (Ravera 1998, Panfili 2000b, Ravera & al. 2006), Laz (Ravera 2001, Nimis & Tretiach 2004), Abr (Gheza & al. 2021). S - Pugl, Cal (Puntillo 1995, 1996

Description: Thallus crustose, green to grey-green, thinly episubstratic, finely granulose, the granules 25-70 µm in diam., resembling soredia but corticate. Apothecia frequent, biatorine, round, sessile, 0.4-0.8(-1.2) mm across, with a strongly convex, whitish, pale yellowish white or pale flesh-coloured disc (in old apothecia sometimes brown), the proper margin indistinct in mature apothecia, but conspicuous in young ones, smooth, paler than disc. Proper exciple well-developed, prosoplectenchymatous, of radiating, branched and anastomosing hyphae, colourless or pale yellow, 50-135 μm wide laterally; epithecium poorly differentiated, colourless to pale orange brown; hymenium colourless, 55-75 µm high; paraphyses mostly simple, coherent, 3-4 µm thick; subhymenium colourless, 50-85 μm high; hypothecium colourless, 100-250 μm high. Asci 8-spored, clavate, with a K/I+ blue apical dome penetrated by a narrow, K/I– apical cushion surrounded by a narrow, deeply K/I+ blue zone, the wall K/I- but surrounded by a I+ red-brown, K/I+ blue outer layer, the ocular chamber relatively small, Biatora-type. Ascospores (0-)1(-3)-septate (most ascospores 1-septate), hyaline, broadly ellipsoid to fusiform, (9-)12-17(-22) x (3-)4-5(-7) µm. Photobiont chlorococcoid. Spot tests, thallus and apothecia K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on mosses growing on the bark of old deciduous trees, especially near the base of trunks in old, humid forests. Several old records are dubious, and could refer to Bilimbia sabuletorum.

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: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: absent

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 http://www.stridvall.se/la/galleries.php

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

Herbarium: TSB (30724)
2003/03/12

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

Herbarium: TSB (30724)
2003/03/12

Domenico Puntillo; Owner: Domenico Puntillo

Italy

Domenico Puntillo; Owner: Domenico Puntillo

Italy

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

Courtesy: Anita Stridvall

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

Courtesy: Anita Stridvall

Author: Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M2/Mycobilimbia_sphaeroides.htm

France, Saint-Jean-Lachalm, alt. 903 m - Haute-Loire - (43) - Forêt des Lombards, Corticole sur Fraxinus excelsior - leg. Arnaud Descheemacker
1/4/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M2/Mycobilimbia_sphaeroides.htm

France, Saint-Jean-Lachalm, alt. 903 m - Haute-Loire - (43) - Forêt des Lombards, Corticole sur Fraxinus excelsior - leg. Arnaud Descheemacker
1/4/2017

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M2/Mycobilimbia_sphaeroides.htm

France, Saint-Jean-Lachalm, alt. 903 m - Haute-Loire - (43) - Forêt des Lombards, Corticole sur Fraxinus excelsior - leg. Arnaud Descheemacker
1/4/2017

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Signy-l'Abbaye

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Signy-l'Abbaye

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Signy-l'Abbaye

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=542&lang=en

France, Crozon

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