Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Myelastridae Riedel, 1971 Genus Myelastrum Haeckel, 1881 1 Myelastrum quadrifolium Takahashi, 1991 2 Myelastrum trinibrachium Takahashi, 1991