- Gordius anguis Dalyell, 1853 accepted as Tubulanus superbus (Kölliker, 1845)
- Gordius annulatus Montagu, 1804 accepted as Tubulanus annulatus (Montagu, 1804)
- Gordius fragilis Dalyell, 1853 accepted as Cerebratulus marginatus [Renier], [1804]
- Gordius gracilis Dalyell, 1853 accepted as Procephalothrix filiformis (Johnston, 1828) accepted as Cephalothrix filiformis (Johnston, 1828)
- Nectonema agile Verrill, 1879
- Nectonema munidae Brinkmann, 1930
- Nectonema svensksundi Bock, 1913