Arthrorhaphis alpina (Schaer.) R. Sant.

in Hawksworth, James & Coppins, Lichenologist 12: 106 (1980).

Basionym: Lecidea flavovirescens var. alpina Schaer., Lich. helv. spicil. 4-5: 162 (1833).


Synonym: Index Fungorum

Protolog: Data lacking.

Type locality: Data lacking.

Type locality coordinates: Data lacking.

Molecular barcode: Data lacking.

Thallus: with more or less rounded, convex, bullate squamules, up to 1 mm in diameter, yellow to yellowish green, corticate, heteromerous, with Ca-oxalate crystals in the medulla. Phytobiont layer 60-70 µm, continuous. Ascomata apothecia, black, 0.1-0.6 mm diam.; disc flat to concave; exciple distinct, often raised, brownish in the outer, green in the inner part (12-)25-55 µm thick. Hypothecium hyaline to green, K+ brown. Hymenium hyaline to light green, with oil drops, 110-150-170 µm high, K-, K/I-; epithecium green, with oil drops, K+ brown. Hamathecium of paraphyses; Paraphyses branched, 1.5-2.5 µm thic, not swollen at the apices. Asci cylindrical to elongate-clavate, K/I-, 80-110 / 12-17 µm, 8-spored. Ascospores arranged in parallel, narrowly fusiform or acicular, hyaline, smooth, (6-)9-13(-14) septate, (24-)29.5-54(-72) / (2.5-)4-7(-8.5) µm (length x=41.7, SD=12.1, width x=5.4, SD=1.5) (Ihlen 1998: 35).

Photobiont: Green alga, photobiont cells + globose, green, 12-18 µm in diameter.

Chemistry: Rhizocarpic acid, epanorin.

Ecology: On sandy soil between mosses In northern Norway from sea-level to 1250 m.

Molecular data: Genbank

Distribution: Database

Note: The lichen grows lichenicolous on Baeomyces rufus, then with a yellow thallus, or as an autonomous lichen.