Order †Cryptostomida Bassler, 1953 Suborder †Ptilodictyina Astrova & Morozova, 1956 1 Family †Ptilodictyidae Zittel, 1880 2 Family †Tamaroclemidae Gorjunova, 1992 3 Family †Worthenoporidae Ulrich, 1889 4 Family †Mysticellidae Gorjunova, 2007 [monotypic]