Imperium naturæ C. Linnaeus, 1758 - nature
Ref: C. Linnaeus, 1758: 5-8 [new rank]
   Mundus Plinius - physical world
  Ref: C. Linnaeus, 1758: 5 [new position]
     naturalia - natural bodies
    Ref: C. Linnaeus, 1758: 6 [implicit position]
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
      Ref: C. Linnaeus, 1758: 9-13
         Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
        Ref: C. Linnaeus, 1758: 12, 78-85
           1 Order Accipitres Linnaeus, 1758 see Suborder Accipitres (C. Linnaeus, 1758)
          Ref: C. Linnaeus, 1758: 81, 86
           2 Order Picae Linnaeus, 1758 see Parvclass Picae (C. Linnaeus, 1758)
          Ref: C. Linnaeus, 1758: 81, 96
           3 Order Anseres Linnaeus, 1758 see Suborder Anseres Linnaeus, 1758
          Ref: C. Linnaeus, 1758: 81, 122
           4 Order Grallae Linnaeus, 1758
          Ref: C. Linnaeus, 1758: 82, 139 [new taxon]
           5 Order Gallinae Linnaeus, 1758
          Ref: C. Linnaeus, 1758: 82, 156
           6 Order Passeres Linnaeus, 1758 see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766
          Ref: C. Linnaeus, 1758: 82, 162