[as 'socotrina'] in Staiger, Bibliotheca Lichenologica 85: 82 (2002).

Basionym: Diorygma socotranum Müll. Arg., in Balfour, Proc. R. Soc. Edinb. 11: 468 (1982), cited by Staiger as 'socotrinum'.

Typification: Balfour s.n. fide IF

Type locality: Yemen, Socotra.

Chemistry: No lichen substances.

Note: The species has been described as Diorygma socotranum Müll.Arg. in 1882. The correction in Index Fungorum is correct (M. Schultz, pers. com.).