Bracteacoccaceae family accepted

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

Microsporaceae family accepted

Neochloridaceae Ettl & Komárek, 1982 family accepted

Radiococcaceae Fott ex Komárek family accepted

Scenedesmaceae Oltmanns, 1904 family accepted

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

Polyedriopsis Schmidle, 1899 genus accepted

Characiaceae family accepted

Pseudomuriella N. Hanagata, 1998 genus accepted

Hydrodictyaceae family accepted

Selenastraceae family accepted

Sphaeropleaceae family accepted

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