Genus
Ordovicia Neckaja, 1956
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Superclass | Oligostraca |
| Class | Ostracoda |
| Subclass | Podocopa |
| Order | Palaeocopida |
| Suborder | Beyrichicopina |
| Superfamily | Tetradelloidea |
| Family | Tetradellidae |
| Subfamily | Glossomorphitinae |
| Perspicillinae | |
| Sigmoopsinae | |
| Sylthinae | |
| Tetradellinae | |
| Genus | Disulcina |
| Oecematobolbina | |
| Ordovicia | |
| Uvonhachtia | |
| Wehrlina |