Basionym Name:Calicium sphaerocephalum var. pusillum Ach., Methodus, Sectio prior (Stockholmiæ): 92 (1803)
Homotypic synonyms:Calicium abietinum f. pusillum (Ach.) Roum., in Roumeguére, Revue mycol., Toulouse 4(14): 105 (1882)Calicium minutellum subsp. pusillum (Ach.) Vain., Meddn Soc. Fauna Flora fenn. 3: 93 (1878)Calicium subtile var. pusillum (Ach.) Torss., Enum. Lich. Byssac. Scandin. (Upsaliae): 43 (1843)