Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [Regnum Primigenum J. Hogg, 1860 - primigenal kingdom] see Kingdom Protoctista Hogg, 1860
           1 [Protoctista Hogg, 1860] see Kingdom Protoctista Hogg, 1860
           2 [Amorphoctista Hogg, 1860 - sponges] see Phylum Porifera Grant, 1836