Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Pisces nom. inval. - fishes see Class Pisces Linnaeus, 1758
           1 Order Plagiuri nom. inval. see Class Mammalia Linnaeus, 1758
           2 Order Chondropterygii nom. inval. see Order Nantes Linnaeus, 1758
           3 Order Branchiostegi nom. inval. see Order Branchiostegi Linnaeus, 1758
           4 Order Acanthopterygii nom. inval. see Order Thoracici Linnaeus, 1758
           5 Order Malacopterygii nom. inval. see Class Pisces Linnaeus, 1758