Family
Holocystitidae Miller, 1889
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Blastozoa |
| Class | Diploporita |
| Superfamily | Sphaeronitida |
| Family | Holocystitidae |
| Genus | Holocystites |
| Family | Parasphaeronitidae |
| Sphaeronitidae |