Rotundellaceae K. Fucíková, P.O. Lewis & L.A. Lewis, 2014 family accepted

Polyedriopsis Schmidle, 1899 genus accepted

Hydrodictyaceae family accepted

Pseudomuriella N. Hanagata, 1998 genus accepted

Bracteacoccaceae family accepted

Bracteamorphaceae K. Fucíková, P.O. Lewis & L.A. Lewis, 2014 family accepted

Characiaceae family accepted

Microsporaceae family accepted

Neochloridaceae Ettl & Komárek, 1982 family accepted

Radiococcaceae Fott ex Komárek family accepted

Scenedesmaceae Oltmanns, 1904 family accepted

Selenastraceae family accepted

Sphaeropleaceae family accepted

Tumidellaceae K. Fucíková, P.O. Lewis & L.A. Lewis, 2014 family accepted