Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Mineræ - minerals
           Order Sulphura
             Genus Bitumen
               1 Bitumen fluidum album, ignem attrahens
               1.0 Naphtha see Bitumen fluidum album, ignem attrahens
               2 Bitumen liqvidum fuscum nudum
               2.0 Petroleum see Bitumen liqvidum fuscum nudum
               3 Bitumen liqvido-tenax nudum
               3.0 Maltha see Bitumen liqvido-tenax nudum
               4 Bitumen solido-tenax nudum
               4.0 Asphaltus see Bitumen solido-tenax nudum
               5 Bitumen solidum nudum
               5.0 Gagas see Bitumen solidum nudum
               6 Bitumen solidum in schisto
               6.0 Carbo fossilis see Bitumen solidum in schisto