Phylum
Cidaroida Claus, 1880
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Echinozoa |
| Class | Echinoidea |
| Phylum | Cidaroida |
| Family | Rhabdocidaridae |
| unranked | Arbacioida |
| Order | Bothriocidaroida |
| Perischoechinoidea | |
| Spatangoida | |
| Family | Archaeocidaridae |