Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
     Class Ciliata see [unranked] ciliates
       Order Spirotricha
         Suborder Hypotricha Stein, 1859
           Genus [Stylonychia] Ehrenberg, 1830
             1 Stylonychia mytilus (Müller, 1773) Ehrenberg, 1830