Basionym Name:Calicium pusillum var. subtile Hepp, Flecht. Europ.: no. 605 (1860)
Homotypic synonyms:Calicium floerkei var. subtile (Hepp) Zahlbr., Cat. Lich. Univers. 1: 601 (1922)Calicium italicum var. subtile (Hepp) Oxner, Flora Lishainikiv Ukraini 1: 311 (1956)