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
           1 Order Apodes Linnaeus, 1758 see Order Anguilliformes Berg, 1943
           2 Order Jugulares Linnaeus, 1758
           3 Order Thoracici Linnaeus, 1758
           4 Order Abdominales Linnaeus, 1758
           5 Order Branchiostegi Linnaeus, 1758