Ceramium thuyoides (Smith) C.Agardh, 1824 species synonym

Compsothamnion decompositum (J.Agardh) Maggs & L'Hardy-Halos, 1993 species accepted

Callithamnion decompositum J.Agardh, 1851 species synonym

Mesothamnion distichum Halos ex G.R.South & Tittley, 1986 species synonym

Compsothamnion gracillimum De Toni species accepted

Compsothamnion thuyoides var. gracillimum (De Toni) Halos, 1964 variety synonym

Compsothamnion thuyoides (Sm.) Nägeli species synonym

Conferva thuyoides Sm. species synonym

Callithamnion gracillimum C.Agardh species synonym

Callithamnion thuyoides (Smith) C.Agardh, 1828 species synonym

Compsothamnion thuyoides (Sm.) F.Schmitz species accepted

Phlebothamnion gracillimum (C.Agardh) Kütz., 1849 species synonym