Gomontiaceae De Toni, 1889 family accepted

Gayraliaceae K.L. Vinogradova, 1969 family accepted

Kornmanniaceae family accepted

Phaeophilaceae D.F. Chappell, C.J. O'Kelly, L.W. Wilcox & G.L. Floyd, 1990 family accepted

Dilabifilum Tschermak-Woess, 1971 genus accepted

Bolbocoleonaceae O'Kelly & Rinkel in Brodie, Maggs & D.M. John, 2007 family accepted

Cloniophoraceae family accepted

Capsosiphonaceae V.J. Chapman, 1952 family accepted

Jaoaceae Fan, 1964 family accepted

Ulvaceae J.V. Lamouroux ex Dumortier, 1822 family accepted

Ulvellaceae Schmidle, 1899 family accepted