Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Mineræ - minerals
           Order Sulphura
             1 Genus Electrum
             2 Genus Bitumen
             3 Genus Pyrites
             4 Genus Arsenicum