Homotypic synonym selon GBIF classification (Originally found in sources as synonym of Xanthidium aculeatum Ehrenb. ex Ralfs, 1848)
Phycastrum muricatum (Bréb.) Kütz. 1849
Homotypic synonym selon GBIF classification (Originally found in sources as synonym of Staurastrum hirsutum var. muricatum (Bréb. ex Ralfs) Kurt Förster, 1970)