Genus
Cephalodiscus McIntosh, 1882
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Cephalodiscida |
| Family | Cephalodiscidae |
| Genus | Aellograptus |
| Atubaria | |
| Cephalodiscus | |
| Eocephalodiscus | |
| Melanostrophus | |
| Pterobranchites |