Protologue type data: Typus: Scotia, V.C. 97, Westerness: Ardnamurchan Peninsula, e margine boreali Loch Sunart, Allt Sailean an Eorna, 17/70.64, cum Arthonia tumidula et Melaspilea sp. e Ilicis, viii. 1970, F. Rose (BM-holotypus).

Type locality: Great Britain, Scotland, V.C. 97, Westerness, Ardnamurchan Peninsula, e margine boreali Loch Sunart, Allt Sailean an Eorna, 17/70.64, cum Arthonia tumidula et Melaspilea sp. e Ilicis, August 1970, F. Rose (BM - holotype).

Description: Lichen. Thallus crustose, pigmentation on and within the apothecia lacking. Spores clavate, 29-33 x 9-12 µm, with a large end cell and an anterior part with 5-7 transverse septa and 1-7 longitudinal septa, not becoming pigmented at maturity.

Photobiont: Data lacking.

Chemistry: No lichen substances.

Ecology: Data lacking.

Distribution type: The species is extremely rare and known from just six localities in Scotland and one locality in Tenerife.

Taxonomy: Data lacking.

Note: The species is similar to Arthonia ilicina and might have been overlooked in the laurisylva of Macaronesia.

Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank