Name(s) in cluster
| †Ptychoceras Orbigny 1842 | urn:lsid:organismnames.com:name:2141991 |
| †Ptychoceras d'Orbigny | urn:lsid:organismnames.com:name:2396215 |
| †Ptychoceras d'Orbigny 1842 | urn:lsid:organismnames.com:name:4692493 |
| †Ptychoceras | urn:lsid:organismnames.com:name:291604 |
...