Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         ["Animale Regnum" nom. inval. - animal kingdom] see Kingdom Animalia Linnaeus, 1758
           [Class "Qvadrupedia" nom. inval.] see Class Mammalia Linnaeus, 1758
             [Order "Glires" nom. inval.] see Order Glires Linnaeus, 1758
               [Genus "Sciurus" nom. inval.] see Genus Sciurus Linnaeus, 1758
                 1 ["Sciurus" Plinius, nom. inval.]
                 2 ["Sciurus volans" nom. inval.]