| Kingdom | Phylum | Order |
|---|---|---|
| Animalia | Gnathostomulida | Filospermoidea |
| Rank | Scientific name | Taxonomic status |
|---|---|---|
| genus | Cosmognathia Sterrer, 1991-14 | accepted |
| genus | Pterognathia Sterrer, 1966 | accepted |
Pterognathiidae. GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via biodiversity.aq on 2019-11-17.