Genus
Ceratopsis Ulrich, 1894
Selection of related publications
Sarv, L. 1959. Ordovician ostracodes in the Estonian S.S.R.. ENSV TA Geoloogia Instituudi Uurimused IV, 1-210.
Neckaja, A. I. 1953. Tetradellidy ordovika Pribaltiki i ih stratigraficheskoe znachenie. Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) 309-363. Gostoptehizdat.
Öpik, A. 1937. Ostracoda from the Ordovician Uhaku and Kukruse formations of Estonia. Tartu Ülikooli Geoloogia Instituudi Toimetused 50, 1-58.
List of species
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Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Superclass | Oligostraca |
| Class | Ostracoda |
| Subclass | Podocopa |
| Order | Palaeocopida |
| Suborder | Beyrichicopina |
| Superfamily | Tetradelloidea |
| Family | Tetradellidae |
| Subfamily | Tetradellinae |
| Supergenus | Winchellatia |
| Genus | Ahla |
| Ceratopsis | |
| Species | margaritata |
| stoermeri | |
| Genus | Consonopsis |
| Dilobella | |
| Foramenella | |
| Glossopsis | |
| Ogmoopsis | |
| Pleurodella | |
| Polyceratella | |
| Tetradella | |
| Utalina |