Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Order Actineliida Doweld, 2001 [monotypic]
           Family Actineliidaeᵀ Doweld, 2001 [monotypic]
             Genus Actineliusᵀ Haeckel, 1865
               1 Actinelius primordialis