Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Characiformes Goodrich, 1909 - characins
           01 Family Citharinidae
           02 Family Distichodontidae
           03 Family Alestidae Hoedeman, 1951
           04 Family Hepsetidae
           05 Family Hemiodontidae
           06 Family Parodontidae
           07 Family Curimatidae
           08 Family Prochilodontidae
           09 Family Anostomidae
           10 Family Chilodontidae Eigenmann, 1903
           11 Family Erythrinidae - trahiras
           12 Family Lebiasinidae
           13 Family Gasteropelecidae - freshwater hatchetfishes
           14 Family Ctenoluciidae - pike-characids
           15 Family Acestrorhynchidae
           16 Family Cynodontidae
           17 Family Serrasalmidae Günther, 1864 see Subfamily Serrasalminae
           18 Family Characidae - characins
           19 Family Crenuchidae