Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
Count: 3c;45o;91f;291g;308s
   Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics
  Count: 22o;40f;122g;1s
     Subclass Coscinodiscophycidae Round & R.M. Crawford (1990)
    Count: [f] 11o;19f;33g
       Order Melosirales R.M. Crawford (1990)
      Count: [f] 4f;6g
         Family Hyalodiscaceae R.M. Crawford (1990)
        Count: 2g
           Genus Hyalodiscusᵀ Ehrenb. (1845)
          Count: -