Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Actinommidae Haeckel, 1862 Subfamily Actinomminae Takahashi, 1991 see Family Actinommidae Haeckel, 1862 Genus Hexacontium Haeckel, 1881 Hexacontium heracliti (Haeckel, 1887)