Lichenologist 25, 3: 226 (1993).

Protologue: Thallus crustaceus, albus vel cremeoalbus, continuus vel rimoso-areolatus, epilithicus. Cortex indistinctus. Medulla alba. Ascomata nigra, dispersa, rotundata vel leviter irregularia, 0.2-0.9 mm lata, adnata vel sessilia ad basin constricta, + marginata. Excipulum integrum vel raro dimidiatum, in parte laterali usque ad 60 µm, in parte inferiore ad 120 µm crassum. Paraphysoides dichotomo-ramosae, laxe cohaerentes, ad 2.5 µm crassae, apice versus leviter incrassatae, valde ramosae. Asci 70-90(-110) x 10-12 µm, a typo 'Bactrospora' dicto. Ascosporae (30-)35-60(-66) x 3-4(-4.5) µm, a typo 'Patellarioides' dicto. Pycnidia immersa, 120-190 x 90-125 µm; pycnosporae 9-14 x 0.8-1 µm, curvatae.

Protologue type data: Typus: Spain. Islas Canarias: Lanzarote, Mirador del Rio, c. 400 m, rocas volcánicas, 13 January 1990, J. M. Egea (MUB!-holotypus, GZU!-isotypus).

Type locality: Spain, Canary Islands, Lanzarote, Mirador del Rio, rocas volcánicas, ca. 400 m, 13 January 1990, J. M. Egea (MUB - holotype; GZU - isotype).

Description: Thallus crustose, whitish to creamy white, sometimes with a pinkish.

Photobiont: Data lacking.

Chemistry: No lichen substances.

Ecology: Data lacking.

Distribution type: Data lacking.

Taxonomy: Data lacking.

Note: When Egea & Torrente described this species from the island Lanzarote (Canary Islands) they listed in addition material from Gran Canaria, Tenerife, Cape Verde, Madeira, Algeria, Morocco, and Senegal.

Basionym: Data lacking.