ITALIC 8.0

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, the disc ochre, orange-brown or red-brown, flat to slightly convex, sometimes thinly whitish-pruinose (only visible when wet), the proper margin distinct, but not prominent, finally often excluded. 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 which sometimes streak into the hymenium, K-, N+ bright orange-brown; 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