Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Quadrupedia nom. inval. - quadrupeds see Class Mammalia Linnaeus, 1758
           Order Glires nom. inval. see Order Glires Linnaeus, 1758
             Genus Sciurus nom. inval. see Genus Sciurus Linnaeus, 1758
               Sciurus Plinius, nom. inval.