Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Vermes Linnaeus, 1758 - worms see Phylum Vermes (C. Linnaeus, 1758)
           Order Zoophyta Linnaeus, 1758
             Genus Pennatula Linnaeus, 1758
               1 Pennatula phosphorea Linnaeus, 1758
               2 Pennatula filosa Linnaeus, 1758 see Pennella filosa (C. Linnaeus, 1758)
               3 Pennatula sagitta Linnaeus, 1758 see Pennella sagitta (C. Linnaeus, 1758)
               4 Pennatula mirabilis Linnaeus, 1758