Brodoa oroarctica (Krog) Goward

Bryologist 89, 3: 222 (1987) [1986].

Basionym: Hypogymnia oroarctica Krog, Lichenologist 6, 2: 136 (1974).


Synonyms: Index Fungorum

Protolog: Data lacking.
Type locality: Norway, Svalbard, Spitsbergen, Lomfjorden, Dvergbreen, 1931, Scholander (O - holotype).
Barcode: Available. Data lacking.
Coordinates: Data lacking.

Thallus: foliose, to 10 cm diameter, irregularly spreading, loosely attached, brown to dark brown to black and only rarely paler, shiny but dull in central parts; lobes often ascending and somewhat entangled, narrow, to 1 mm wide, forked or irregularly branched, tapering at the tips, often linear but torulose (constricted at intervals); lower surface black, usually with a thin whitish pruina in the outer parts, brown at the lobe tips. Apothecia rare, to 5 mm diam.; disc brown. Spores broadly ellipsoid, 10-12 x 8 μ. Pycnidia frequent. Conidia bifusiform, 5-7 x 1 μ.

Photobiont: Data lacking.

Chemistry: Cortex K+ yellow; atranorin. Medulla C+, red, K—, KC+ red, PD—, or PD+ orange near the lobe tips; physodic acid and traces of protocetraric acid and sometimes ?imarprotocetraric acid.

Ecology: Saxicolous on highly exposed siliceous (basaltic in Iceland) rocks in alpine areas or tundra heaths occasionally on soil or small pebbles on the ground in windswept patches.

Molecular data: Genbank

Distribution: Distinctly northern, occurring only at high altitudes in the southem parts of its distribution area. An arctic-alpine, northern boreal, circumpolar species and the only Brodoa occurring in North America. Database