ITALIC 7.0

Myochroidea leprosula (Arnold) Printzen, T. Sprib. & Tønsberg

Lichenologist, 40: 198, 2008. Basionym: Biatora leprosula Arnold - Lich. Exs.: 545, 1874.

Synonyms: Lecidea leprosula (Arnold) Harm.

Distribution: N - Frl (Hinteregger 1994, in Austrian terr., near the border).

Description: Thallus crustose, episubstratic, grey to grey-brown, of densely crowded, 0.05-0.15 mm wide, strongly convex, often slightly crenate to subcoralloid, isidia-like areoles. Apothecia biatorine, round to slightly irregular in outline, sessile with a constricted base or more rarely appressed, 0.3-0.8 mm across, with a ochre, orange-brown or red-brown, flat to slightly convex, sometimes thinly whitish-pruinose (only visible when wet) disc, and a distinct, but not prominent, finally often excluded proper margin. Proper exciple brown and with minute colourless granules in outer part, colourless or pale yellow within, laterally 40-100 μm thick, of densely entangled, branched and anastomosing hyphae with slightly thickened and pigmented apical cells; epithecium to 25 μm high, pale ochre to reddish brown, with colourless to pale ochre granules, K-, N+ bright orange-brown, sometimes streaking into the hymenium; hymenium colourless, 60-75 μm high; paraphyses relatively easily separated, sparingly branched and anastomosing, 0.7-1.5 μm thick, the apical cells to 2 μm wide; hypothecium colourless to yellowish, 70-150 μm high. 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, approaching the Micarea-type. Ascospores 1-celled, hyaline, broadly ellipsoid, 9.5-15.5 x 4-8 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: 2 fatty acids.

Note: a circumboreal species growing on twigs of subalpine shrubs, certainly more widespread in the Alps.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 20796

Pier Luigi Nimis - CC BY-SA 4.0

Herbarium: TSB 20796

P.L. Nimis CC BY-SA 4.0

TSB 20796