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 | Annelida Lamarck, 1809 - annelids |
| class | Polychaeta Grube, 1850 - polychaetes |
| subclass | Errantia |
| infraclass | Aciculata |
| order | Phyllodocida Dales, 1962 |
| superfamily | Nereididacea |
| family | Syllidae Grube, 1850 |
| subfamily | Syllinae |
| genus | Parasphaerosyllis Monro, 1937 |
| species | Parasphaerosyllis ezoensis Imajima & Hartman, 1964 |