Genus
Didymaspis Lankester, 1867
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Superclass | Agnatha |
| Class | Cephalaspidomorphi |
| Subclass | Osteostraci |
| Order | Cephalaspidiformes |
| Genus | Didymaspis |
| Meelaidaspis | |
| Ohesaareaspis |