Micarea lignaria (Ach.) Hedl. var. lignaria

Bih. K. Svenska Vetensk.-Akad. Handl., 3, 18: 93, 1892. Basionym: Lecidea lignaria Ach. - K. Vetensk.-Akad. Nya Handl., 29: 236, 1808.
Synonyms: Bacidia gomphillacea (Nyl.) Zahlbr.; Bacidia granulans sensu H. Magn.; Bacidia lignaria (Ach.) Lettau; Bacidia meizospora (Nyl.) Zahlbr.; Bacidia milliaria (Fr.) Sandst.; Bilimbia lignaria (Ach.) A. Massal.; Bilimbia milliaria (Fr.) Körb.; Lecidea geomaea Taylor; Lecidea meizospora Nyl.; Lecidea milliaria Fr.; Micarea gomphillacea (Nyl.) Vězda
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Nascimbene 2008c, Nascimbene & al. 2013b, Watson 2014), TAA (Nascimbene 2006c, 2008b, Nascimbene & al. 2007b, Nimis & al. 2015), Lomb, Piem (Isocrono & al. 2004, 2006), Emil (Dalle Vedove & al. 2002, Fariselli & al. 2020), Lig (Brunialti & al. 1999). C - Tosc (Benesperi & al. 2007), Umb (Herb. Ravera 2708), Laz (Stofer 2006), Abr (Gheza & al. 2021), Sar (Nöske 2000, Rizzi & al. 2011). S - Camp (Ricciardi & al. 2000), Cal (Puntillo 1996).
Description: Thallus crustose, endosubstratic or composed of grey-white to grey-green, usually convex-granulose, 0.1-0.3 mm wide areoles. Apothecia micareoid, black or blue-black, sessile to substipitate, often tuberculate, 0.15-0.6(-0.9) mm across, with a convex to almost globose disc, without a proper margin. Proper exciple poorly developed and soon excluded, brownish in outer part; epithecium scarcely differentiated from the hymenium; hymenium 50-75 μm tall, colourless, or olivaceous to blue-green in upper and sometimes lower parts, the pigmented parts K-, N+ red, rarely with a few scattered, minute violaceous granules reacting K+ green; paraphyses numerous, 1.5-2 μm thick at mid-level, simple or sparingly branched in upper part, the apical cells often slightly swollen; hypothecium pale blue-green or olivaceous, K-, the central part often colourless or pale brown. Asci 8-spored, cylindrical-clavate, the I+ blue tholus with a wide, I+ dark blue tube structure that expands towards the top, without a pale axial body. Ascospores (3-)4-7-septate, hyaline, fusiform to narrowly fusiform, straight or slightly curved, rounded at one end and acute at the other, 16-36(-38) x 4-6(-7) μm. Pycnidia more or less immersed, the wall green (K-) in upper parts, producing three types of conidia: a) curved, 3-7-septate macroconidia measuring 16-22 x c. 1 μm, b) cylindrical to obovoid mesoconidia measuring 4-7 x 1.5-2 μm, c) narrowly cylindrical microconidia measuring 5-7 x c. 0.8 μm. Photobiont micareoid, the cells 4-7 μm wide. Spot tests: thallus K-, C-, KC-, P+ orange-red; apothecial sections C-. Chemistry: thallus with argopsin.
Note: a widespread temperate to boreal-montane species, one of the most common of the genus in Italy, found on a wide variety of acid substrata such as plant remains, bark, and lignum, more rarely siliceous rocks, in humid situations. The records from Umbria by Ravera & al. (2006, 2006b) do not refer to this species (Ravera, in litt.).
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rather common
Oromediterranean belt: rare
Montane belt: rather common
Submediterranean belt: rare
Padanian area: extremely rare
Humid submediterranean belt: rather rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent

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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Predictive model
Herbarium samples


Felix Schumm – CC BY-SA 4.0
[14994], Germany, Bayern, Kreis Traunstein, nahe der Talstation der Seilbahn zum Hochfelln, auf Holzbalken bei 600 m



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5242)
2001/11/27



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34650)
2002/01/30



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (36789)
2008.02.28



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (36789)
2008.02.28



Domenico Puntillo; Owner: Domenico Puntillo
Italy


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 (34650)
2002/01/30



Felix Schumm – CC BY-SA 4.0
[14994], Germany, Bayern, Kreis Traunstein, nahe der Talstation der Seilbahn zum Hochfelln, auf Holzbalken bei 600 m



Felix Schumm – CC BY-SA 4.0
[14994], Germany, Bayern, Kreis Traunstein, nahe der Talstation der Seilbahn zum Hochfelln, auf Holzbalken bei 600 m



Felix Schumm – CC BY-SA 4.0
[14994], Germany, Bayern, Kreis Traunstein, nahe der Talstation der Seilbahn zum Hochfelln, auf Holzbalken bei 600 m



Felix Schumm – CC BY-SA 4.0
[14994], Germany, Bayern, Kreis Traunstein, nahe der Talstation der Seilbahn zum Hochfelln, auf Holzbalken bei 600 m



Pier Luigi Nimis - CC BY-SA 4.0
TSB 5242



Pier Luigi Nimis - CC BY-SA 4.0
TSB 5242



Pier Luigi Nimis - CC BY-SA 4.0
TSB 5242