Arbacioida Gregory, 1900
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Echinozoa |
| Class | Echinoidea |
| Phylum | Cidaroida |
| Family | Rhabdocidaridae |
| Subfamily | Psychocidaridae |
| unranked | Arbacioida |
| Genus | Gymnocidaris |
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Echinozoa |
| Class | Echinoidea |
| Phylum | Cidaroida |
| Family | Rhabdocidaridae |
| Subfamily | Psychocidaridae |
| unranked | Arbacioida |
| Genus | Gymnocidaris |