Cymatiosphaera O. Wetzel, 1933 genus accepted

Polyedrixium J. Deunff, 1954 ex Deunff, 1961 genus accepted

Pterospermopsis W. Wetzel, 1952 genus accepted

Tytthodiscus W.L. Norem, 1955 genus accepted

Hungarodiscus E. Kriván-Hutter, 1963 genus accepted

Leiosphaerdia A. Eisenack, 1958 genus accepted

Crassosphaera I.C. Cookson & S. Manum, 1960 genus accepted

Dictyotidium Eisenack, 1955 genus accepted

Duvernaysphaera F.L. Staplin, 1961 genus accepted

Melikeriopalla H. Tappan & A.R. Loeblich Jr., 1972 genus accepted

Glyptosphaera V.V. Kirjanov, 1978 genus accepted

Granodiscus K. Mädler, 1963 genus accepted

Pseudoscourfieldia I. Manton, 1975 genus accepted

Pycnococcus R.R.L. Guillard in R.R.L. Guillard, Keller, O'Kelly & Floyd, 1991 genus accepted

Quadratitum F.H. Cramer, 1964 genus accepted

Tapajonites F.W. Sommer & N.M. van Boekel, 1963 genus accepted

Tarsisphaeridium W. Riegel, 1974 genus accepted