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 Testacea Linnaeus, 1758
             Genus Helix Linnaeus, 1758
               Rotundatae anfractibus & umbilicatae
                 587 Helix cornea Linnaeus, 1758
                 588 Helix spirorbis Linnaeus, 1758
                 589 Helix contorta Linnaeus, 1758
                 590 Helix cornu arietis Linnaeus, 1758
                 591 Helix hispida Linnaeus, 1758
                 592 Helix ampullacea Linnaeus, 1758
                 593 Helix pomatia Linnaeus, 1758
                 594 Helix glauca Linnaeus, 1758
                 595 Helix citrina Linnaeus, 1758
                 596 Helix arbustorum Linnaeus, 1758
                 597 Helix ungulina Linnaeus, 1758
                 598 Helix itala Linnaeus, 1758
                 599 Helix hispana Linnaeus, 1758
                 600 Helix lutaria Linnaeus, 1758
                 601 Helix perversa Linnaeus, 1758