Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Amphibia nom. inval. - reptiles and amphibians see Class Amphibia Linnaeus, 1758
           Order Serpentia nom. inval. see Order Serpentes Linnaeus, 1758
             Genus Rana nom. inval. see Genus Rana Linnaeus, 1758
               Bufo nom. inval. see Rana bufo Linnaeus, 1758