Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Bacillariobiota Doweld (2001)
       Subkingdom Bacillariobiotina Doweld (2001)
         Phylum Raphidomonadophyta Doweld (2001)
           Subclass Raphidomonadophycidae Doweld (2001) [monotypic]
             Order Raphidomonadales Doweld (2001) [monotypic]
               1 Family Raphidomonadaceae Doweld (2001), nom. cons. prop.