[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Class Coscinodiscophyceae Round & R.M. Crawford (1990) - radial centrics
       Subclass Coscinodiscophycidae Round & R.M. Crawford (1990)
         Order Melosirales R.M. Crawford (1990)
           Family Melosiraceae Kütz. (1844)
             Genus Melosira C.Agardh (1824)
               Melosira nummuloides (Dillwyn) C.Agardh (1824)