Kingdom Protoctista Hogg, 1860 Phylum Microspora Sprague, 1977 - microsporans see Phylum Microsporida Balbiani, 1882 1 Class Rudimicrosporea Sprague, 1977 2 Class Microsporea Levine & Corliss, 1963 see Class Microsporidea Corliss & Levine, 1963 3 ?Genus Microsporidium Balbiani, 1884