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
               1 Bufo nom. inval. see Rana bufo Linnaeus, 1758
               2 Rana arborea nom. inval.
               3 Rana aquatica nom. inval.
               4 Rana Carolina nom. inval.