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 Trochus Linnaeus, 1758
               Umbilicati erecti, perforata columella
                 502 Trochus maculatus Linnaeus, 1758
                 503 Trochus perspectivus Linnaeus, 1758
                 504 Trochus hybridus Linnaeus, 1758
                 505 Trochus cruciatus Linnaeus, 1758
                 506 Trochus pharaonius Linnaeus, 1758
                 507 Trochus magus Linnaeus, 1758
                 508 Trochus modulus Linnaeus, 1758
                 509 Trochus muricatus Linnaeus, 1758
                 510 Trochus scaber Linnaeus, 1758
                 511 Trochus varius Linnaeus, 1758
                 512 Trochus cinerarius Linnaeus, 1758
                 513 Trochus divaricatus Linnaeus, 1758
                 514 Trochus umbilicaris Linnaeus, 1758