Beitr. Naturk Oberösterreichs 13: 214 (2004).

Basionym: Verrucaria squamulosa M. Brand & van den Boom, in van de Boom & Brand, Linzer biol. Beitr. 35, 1: 548 (2003).

Type locality: Belgium, on Roman wall renovated with flint and mortar, van den Boom 19803 (van den Boom - holotype).