Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Pleuronectiformes Bleeker, 1859 - flatfishes
           Family Achiridae Rafinesque, 1815
           Family Achiropsettidae
           Family Bothidae Norman, 1934 - lefteye flounders
           Family Citharidae
           Family Cynoglossidae Jordan, 1963 - tonguefishes
           Family Paralichthyidae
           Family Pleuronectidae Rafinesque, 1815, nom. corr. - righteye flounders
           Family Psettodidae - psettodids
           Family Scophthalmidae
           Family Soleidae Gilbert, 1905 - soles