Nordic J. Bot. 31, 1: 48 (2013). Basionym: Placodium castellanum Räsänen, (1943). Type locality: Russia, Karelia ladogensis, Sortavala, Valamo, Niikkana, 6 July 1939, Räsänen (H).
Basionym: Placodium castellanum Räsänen, (1943).
Type locality: Russia, Karelia ladogensis, Sortavala, Valamo, Niikkana, 6 July 1939, Räsänen (H).