| Regnum | Animalia |
|---|---|
| Phylum | Echinodermata |
| Classis | Echinoidea |
| Superordo | Neognathostomata |
| Familia | Nucleolitidae |
| Genus | †Catopygus |
| Subdivision ranks | Species |
| Subdivision |
|
Catopygus is an extinct genus of sea urchins in the family Nucleolitidae.
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| Regnum | Animalia |
|---|---|
| Phylum | Echinodermata |
| Classis | Echinoidea |
| Superordo | Neognathostomata |
| Familia | Nucleolitidae |
| Genus | †Catopygus |
| Subdivision ranks | Species |
| Subdivision |
|
Catopygus is an extinct genus of sea urchins in the family Nucleolitidae.