ITALIC 8.0

Microcalicium ahlneri Tibell

Bot. Not., 131: 234, 1978.

Synonyms:

Distribution: N - Frl (Puntillo & Puntillo 2009, Brackel 2016), TAA (Thor & Nascimbene 2007, Brackel 2016).

Description: Thallus not evident, not lichenized. Apothecia short-stalked, 0.4-0.7(-1.1) mm high, the stalk 0.06-0.12 mm thick, simple or rarely branched, dull black, with a coarsely granular surface deriving from clusters of sclerotized hyphae, the outer part formed of irregular groups of sclerotized hyphae, the inner part of aeruginose, thick-walled, strongly arched hyphae forming an almost paraplectenchymatous tissue, K+ yellowish brown, N+ pale aeruginose. Capitulum narrowly conical, 0.1-0.3(-0.4) mm across. Exciple poorly developed, reddish brown, K+ dark yellowish brown, N+ yellowish brown; mazaedium well-developed, green-black, not higher than the width of the capitulum, with persisting, sclerotized paraphyses with a coarse surface. 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, blue-green, broadly ellipsoid, 5-7 x 2-2.5(-2.8) µm, with a distinct ornamentation of spirally arranged ridges. Photobiont absent. Spot tests: exciple K+ dark yellowish brown, N+ yellowish brown; stalk K+ yellowish brown, N+ pale aeruginose. Chemistry: without lichen substances, except an aeruginose pigment.

Note: on decorticated stumps of conifers heavily attacked by brown rot fungi, more rarely of deciduous trees, often in cavities and cracks, confined to humid upland areas; probably overlooked in the Alps, but certainly never common.

Growth form: Fungus

Substrata: lignum

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

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

Index Fungorum GBIF

H. Gundersen - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

Domenico Puntillo - CC BY-SA 4.0

Lago di Sauris (Friuli Venezia Giulia) D. Puntillo 6.12.1987 su legno di conifera

Domenico Puntillo - CC BY-SA 4.0

Lago di Sauris (Friuli Venezia Giulia) D. Puntillo 6.12.1987 su legno di conifera