| Rank | Scientific name | Taxonomic status |
|---|---|---|
| class | Kinorhyncha | accepted |
| class | Loricifera | accepted |
| class | Priapulida | accepted |
Cephalorhyncha. GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via biodiversity.aq on 2021-08-12.