Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758
           Order Apodes Linnaeus, 1758 see Order Anguilliformes Rafinesque, 1810
             Genus Gymnotus Linnaeus, 1758
               1 Gymnotus carapo Linnaeus, 1758 - banded knifefish
               2 Gymnotus asiaticus Linnaeus, 1758 see Channa asiatica (C. Linnaeus, 1758)