Genus
Ordovicia Neckaja, 1956
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Ostracoda |
| Order | Beyrichicopida |
| Suborder | Palaeocopa |
| Superfamily | Hollinacea |
| Family | Tetradellidae |
| Subfamily | Glossomorphitinae |
| Perspicillinae | |
| Sigmoopsinae | |
| Sylthinae | |
| Tetradellinae | |
| Genus | Ordovicia |
References based on distribution
- Schallreuter, 1968a Visby, Gotland
- Schallreuter, 1977b Lickershamn, Gotland
- Pushkin, 1987a Vangishki 205 borehole 429.2 - 429.2 Kukruse Stage
- Pushkin, 1987a 909.9 - 913.2 Kukruse Stage