Family
Kionoceratidae Hyatt, 1900
List of species
3. Ringoceras praecurvum Strand, 1934 | Ordovician
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Orthocerida |
| Suborder | Orthoceratina |
| Family | Baltoceratidae |
| Choanoceratidae | |
| Kionoceratidae | |
| Genus | Kionoceras |
| Polygrammoceras | |
| Ringoceras | |
| Family | Stereoplasmoceratidae |
| Genus | Tripteroceras |
See also