Ruthenoceras
| Ruthenoceras | |
|---|---|
| Scientific classification   | |
| Kingdom: | Animalia | 
| Phylum: | incertae sedis | 
| Genus: | † | 
Ruthenoceras is a conical Cambrian fossil originally classified as a cephalopod, but which is too poorly preserved for a classification to be upheld.[1]
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