| Kingdom | Phylum | Family |
|---|---|---|
| Animalia | Hemichordata | Hormograptidae |
| Rank | Scientific name | Taxonomic status |
|---|---|---|
| species | Hormograptus amulus Öpik | accepted |
| species | Hormograptus defensor Öpik | accepted |
| species | Hormograptus sphaericola Öpik | accepted |
Hormograptus Öpik, 1930. GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via biodiversity.aq on 2019-11-17.