ITALIC 8.0

Myochroidea rufofusca (Anzi) Printzen, T. Sprib. & Tønsberg

Lichenologist, 40: 204, 2008. Basionym: Biatora rufofusca Anzi - Cat. Lich. Sondr.: 76, 1860.

Synonyms: Biatora porphyroplaca Hinter. & Poelt; Lecidea rufofusca (Anzi) Th. Fr.

Distribution: N - Ven, TAA (Dalla Torre & Sarnthein 1902, Nascimbene & al. 2022), Lomb.

Description: Thallus crustose, episubstratic, grey-white, grey-brown or greenish brown, warted-areolate, of (0.1-)0.2-0.5 mm wide, weakly to strongly convex, often crenate, sometimes subcoralloid areoles with more or less elevated margins, sometimes delimited by a dark prothallus. Apothecia biatorine, round to flexuose in outline, rarely tuberculate, sessile and slightly constricted at base, 0.3-0.8(-1.4) mm across, with a reddish to blackish brown, rarely ochraceous, flat to strongly convex, epruinose disc, and a distinct, not or only weakly prominent, finally sometimes excluded proper margin. Proper exciple 35-90 µm wide laterally, orange to reddish brown in outer part, colourless to pale orange-brown within, of densely entangled, branched and anastomosing hyphae with slightly thickened and pigmented apical cells; epithecium orange-brown to dark reddish brown, 10-15 µm high, K-; hymenium colourless, 60-90(-100) µm high, I+ blue; paraphyses rather lax, sparingly branched and anastomosing, 0.7-1 µm thick at mid-level, the apical cells to 3(-5) µm wide; hypothecium colourless to pale yellowish, 70-150(-200) 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, ellipsoid to ovoid (9.5-)11-15(-18) x (4-)6-8(-9) µm. Pycnidia rare, immersed in the thallus, c. 0.1 mm across, ochraceous brown to dark brown. Microconidia rare, bacilliform, 5-8 x 0.5-0.8 µm; macroconidia more frequent, thread-like, 12-25 x 0-5-0-8 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ faintly yellow, C- or C+ faintly yellow, KC-, P- or P+ faintly yellow, UV+ yellow-orange. Chemistry thallus with different xanthones.

Note: on terricolous mosses and plant debris over siliceous substrata, sometimes also on the bark of subalpine shrubs, with optimum near treeline; probably restricted to the Alps in Italy.

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: absent

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 20788

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

Herbarium: TSB (20788)
2001/11/22

P.L. Nimis CC BY-SA 4.0

TSB 20788

Pier Luigi Nimis - CC BY-SA 4.0

Herbarium: TSB 20788