Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Fossilia nom. inval. - Lapides aggregati
           Order Petrificata - fossils
             1 Genus Graptolithus nom. inval.
             2 Genus Phytolithus nom. inval. - fossil plants
             3 Genus Helmintholithus nom. inval. - fossil 'worms'
             4 Genus Entomolithus nom. inval. - fossil arthropods
             5 Genus Ichthyolithus nom. inval. - fossil fishes
             6 Genus Amphibiolithus nom. inval. - fossil reptiles and amphibians
             7 Genus Ornitholithus nom. inval. - fossil birds
             8 Genus Zoolithus nom. inval. - fossil mammals