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), Lomb.
Description: Thallus crustose, episubstratic, , grey, 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. Apothecia biatorine, round to flexuose in outline, rarely tuberculate, sessile and 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; epithecium orange-brown to dark reddish brown, K-; hymenium colourless, 60-90 µm high; paraphyses rather lax, sparingly branched and anastomosing, 0.7-1 µm thick at mid-level, the apical cells to 3 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. Photobiont chlorococcoid. Spot tests: thallus K- or K+ faintly yellow, C-, 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:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model


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