IRMNG Taxon list
Symplassosphaeridium B.V. Timofeev ex B.V. Timofeev, 1966 †Symplassosphaeridium biglume Rudavskaya in Rudavskaya & Timofeev †Symplassosphaeridium bulbosum P.K. Maithy & M. Shukla †Symplassosphaeridium bushimayense P.K. Maithy †Symplassosphaeridium cambriense Slavíková, 1968 ex Fensome et al., 1990 †Symplassosphaeridium dictyotum Ou-yang, Yin & Li, 1974 †Symplassosphaeridium infriatum Chen et al., 1980 †Symplassosphaeridium mycterum Timofeev, 1960 †Symplassosphaeridium piluliferum Rudavskaya in Rudavskaya & Timofeev †Symplassosphaeridium specusum Ou-yang, Yin & Li, 1974 †Symplassosphaeridium tumidulum Timofeev, 1959 ex Timofeev, 1969 †Symplassosphaeridium undosum Jankauskas, 1979 †
