Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 - bilaterians |
| subdivisio | Protostomia Grobben, 1908 - protostomes |
| phylum | Platyhelminthes Minot, 1876 - flatworms |
| subphylum | Neodermata Ehlers, 1985 |
| class | Cestoda - tapeworms |
| subclass | Nephroposticophora |
| superorder | Eucestoda |
| order | Pseudophyllidea Carus, 1863 |
| family | Diphyllobothriidae |
| genus | Diphyllobothrium Cobbold, 1858 |
| species | Diphyllobothrium quadratum (Linstow, 1892) |