Microcalicium arenarium (A. Massal.) Tibell

Microcalicium arenarium (A. Massal.) Tibell

Bot. Not., 131: 237, 1978. Basionym: Cyphelium arenarium Hampe ex A. Massal. - Miscell. Lichenol.: 20, 1856.

Synonyms: Calicium arenarium (A. Massal.) Körb.; Calicium citrinum (Leight.) Nyl.; Calicium gneissicum Nyl.; Calicium pulverariae Auersw.; Coniocybopsis arenaria (A. Massal.) Vain.

Distribution: N - TAA (Puntillo & Puntillo 2009, Brackel 2016), Piem (Isocrono & al. 2004, Puntillo & Puntillo 2009, Brackel 2016, Hafellner 2023). C - Umb (Genovesi & al. 2001, Ravera & al. 2006, Puntillo & Puntillo 2009, Brackel 2016). S - Cal (Puntillo 1994, 1995, 1996, Puntillo & Puntillo 2009, Brackel 2016).

Description: Thallus not evident, not lichenized. Apothecia long-stalked, (0.6-)0.8-1.8(-2.5) mm high, the stalk 0.08-0.12 mm thick, black or dark grey, smooth or coarsely granular from clusters of sclerotized hyphae, the outer part covered by groups of dark, sclerotized hyphae, the inner part of pale, periclinally arranged, interwoven hyphae. Capitulum spherical, 0.2-0.3 mm across. Exciple poorly developed, reddish brown in section, forming a small basal collar; paraphyses not sclerotized, dissolving early; mazaedium well-developed, not higher than the width of the capitulum, green-black. Asci 8-spored, broadly ellipsoid, formed in chains from ascogenous hyphae lacking croziers, with a single functional wall layer, deliquescing at maturity. Ascospores 1-septate, green-brown, broadly ellipsoid, 6.7-8.2 x 2-2.9 µm, with a distinct ornamentation of spirally arranged ridges. Photobiont absent. Spot tests: exciple, stalk and ascospores K+ yellowish brown, N+ aeruginose. Chemistry: without lichen substances, except a green pigment.

Note: oon silicicolous lichens, soil, rootlets, decorticated stumps and algal colonies beneath overhangs of siliceous rocks, often together with Psilolechia lucida; probably more widespread in the Alps than the few records would suggest, reaching up to the mountains of Calabria.

Growth form: Fungus

Substrata: rocks

Reproductive strategy: mainly sexual

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very 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

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Monthermé

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

Herbarium: TSB (14650)
2001/12/05

Domenico Puntillo - CC BY-SA 4.0

Italia. Calabria. Cosenza, Cerzeto 01/05/1991

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Monthermé

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Monthermé

Domenico Puntillo CC BY-SA 4.0

Calabria. Cosenza, Cerzeto
01/05/1991

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Monthermé

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=934&lang=en

Belgium, Houyet

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