| Kingdom | Phylum | Class | Order |
|---|---|---|---|
| Animalia | Echinodermata | Echinoidea | Echinothurioida |
| Rank | Scientific name | Taxonomic status |
|---|---|---|
| genus | Hemiphormosoma Mortensen, 1934 | accepted |
| genus | Paraphormosoma Mortensen, 1934 | accepted |
| genus | Phormosoma Thomson, 1872 | accepted |
Phormosomatidae. GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via biodiversity.aq on 2019-11-30.