Bryologist 96: 402 (1993).

Basionym: Cetraria andrejevii Oxner, J. Bot. Acad. Sci. RSS Ukraine [Bot. Zhurn, Kiev] 1: 44 (1940).

Synonyms: Index Fungorum

Protolog: Data lacking.

Type locality: Russia, Sakha Republic (Yakutia), Distr. Bulun, Montes Charaulack [Kharaulakh], Karavaev (KW - holotype)

Barcode: Available. Data lacking.

Coordinates: Data lacking.

Thallus: fruticose, erect, to 10 cm high, weakly dichotomous or more irregularly branched, broader forms almost unbranched. Lobes variable in size and shape, usually 2 - 10 - 30 mm broad, usually canaliculate, but broader lobe portions flatter; margins usually cucullate; marginal lobules sometimes present. Lower surface usually variegated dark brown to chestnut-brown or yellowish-brown in upper parts of lobes, middle parts paler brown to greyish-brown, basal parts greyish to dull yellowish, or more uniformly dark brown, chestnut-brown, pale brown or yellowish brown, much wrinkled or moderately so, pitted or sometimes smoother, glossy or dull. Upper surface concolorous, faintly ridged or wrinkled, pitted or more smooth, glossy or dull. Marginal pseudocyphellae very narrow and indistinct. Laminal pseudocyphellae small and indistinct, rarely more distinct, dull. Marginal projections scattered, 0.1-1 mm long, sometimes branched. Sorarial extremely rare. Upper cortex 20-40 µm thick, paraplectenchymatous, consisting of 2-3 µm layers of pachydermatous cells. Medulla 60-180-260 µm thick, lax to compact; hyphae 2-3 µm thick. Lower cortex 20-40 µm thick, consisting of 2-3 layers of pachydermatous cells. Apothecia at lobe ends, rare; disc 5-15 mm; dark brown, brown or yellowish-brown, glossy and smooth. Hymenium 40-50 µm thick, asci clavate, 35-40 x 8-10 µm. Spores ellipsoidal to subglobose, 6.5-8.5 x 5.0 µm. Paraphyses septate, 40-50 x 1.5-2 µm. Hypothecium 20-25 µm thick. Pycnidia at ends of marginal projections, dark brown. Coniophores 20-40 µm thick. Pycnoconidia rod- or dumb-bell-shaped, 3.5-6.5 x 0.5-1 µm. (Kärnefelt 1979: 57; Thell & Kärnefelt 2011: 18).

Photobiont: Algae concetrated near upper cortex or spread throughout medulla, 8.5-12 µm in diameter. Trebouxia.

Chemistry: Cortex C-, K-, KC-, PD-, Medulla C-, K-, KC-, PD-; rangiformic acid, norrangiformic acid (Kärnefelt 1979: 59; Thell & Kärnefelt 2011: 18). "Tibell (in Krog 1968) failed to detect norrangiformic acid in A. andrejevii with TLC" (Kärnefelt 1969: 59).

Ecology:

Molecular data: Genbank

Distribution: Greenland and a single occurrence in Finnmark in the north-easternmost part of the Scandinavian Peninsula. Widely distributed in the amphi-Beringian region. Database

Note: