Basionym Name:Sphaerophorus polycarpus Colenso, [as 'Sphaerophoron polycarpum'] Trans. Proc. N.Z. Inst. 16: 361 (1884)
Homotypic synonyms:Calycidium polycarpum (Colenso) Wedin, Lichenologist 34(1): 67 (2002)