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 Mammalia Linnaeus, 1758 - mammals
           Quadrupedia Linnaeus, 1758 see Class Mammalia Linnaeus, 1758
             Order Primates Linnaeus, 1758 - primates
               Genus Homo Linnaeus, 1758 - people
                 Homo Sapiens Linnaeus, 1758 - human
                   Homo Sapiens Ferus Linnaeus, 1758 - feral man
                     1 (Specimen) Juvenis Urſinus lithuanus 1661 - the Lithuanian bear-boy
                     2 (Specimen) Juvenis Lupinus heſſenſis 1344 - the Hessian wolf-boy
                     3 (Specimen) Juvenis Ovinus hibernus N. Tulp, 1672 - Irish sheep-boy
                     4 (Specimen) Juvenis Hannoveranus 1724 - wild Peter of Hannover
                     5 (Specimen) Pueri 2 Pyrenaici 1719 - the Pyrenees boys
                     6 (Specimen) Johannes Leodicenſis H. Boerhaave - Jean of Liège