ITALIC 8.0

Micarea contexta Hedl.

Bih. K. Svenska Vetensk.-Akad. Handl., 3, 18: 83, 1892.

Synonyms: Catillaria contexta (Hedl.) Zahlbr.

Distribution: N - Frl.

Description: Thallus crustose, endosubstratic, usually inconspicuous and poorly evident. Apothecia micareoid, subglobose and immarginate from the beginning, black, 0.1-0.2(-0.3) mm across. Proper exciple indistinct: epithecium poorly differentiated from the hymenium; hymenium colourless in lower part, dull green and N+ red in upper part, 35-45 μm high, with greenish vertical streaks and variable amounts of purple violet, K+ blue-green granules; paraphyses rather few, of two types: a) less than 1 μm wide, hyaline, sometimes branched and anastomosing, and, b) 1.5-2 μm wide, the apices widening to 3 μm, usually simple, pigmented and arranged in vertical streaks; hypothecium dark purple-green, K+ intensifying green. Asci 8-spored, clavate to cylindrical-clavate, with an unstained wall and a K/I+ blue outer layer and apical dome, the latter with a non-amyloid, cylindrical axial mass. Ascospores 1-septate, hyaline, oblong to ovoid, 7-12(-14) x 3-4.6 μm. Pycnidia black, immersed to sessile, the wall greenish, K- or K+ intensifying green, N+ purple-red, producing either oblong mesoconidia measuring 3.5-4.5 x 1.5-2 μm or bacilliform microconidia measuring 4-5 x 0.5-1 μm. Photobiont micareoid, the cells 5-7 μm wide. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: thallus and apothecia without lichen substances.

Note: mostly on wood in sheltered situations, such as in montane to subalpine woodlands; reported from the mountains of Friuli, but perhaps more widespread in the Alps.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: very 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

Index Fungorum GBIF

ell Museum of Natural History, University of Minnesota - Lichens (MIN:Lichens) - Public Domain

Collector: J. T. Hedlund Number: s.n. Date: 1892-07-00 Verbatim Date: 18 7 92 Locality: Sweden, Angermanland, Tåsjö Latitude/Longitude: 64.2223308 15.9008537 Notes: Imager: Ryan Allen; Date Imaged: 6/1/2022