Name(s) in cluster
| †Placenticeras Meek 1870 | urn:lsid:organismnames.com:name:1208685 |
| †Placenticeras | urn:lsid:organismnames.com:name:374872 |
| †Placenticeras Meek 1876 | urn:lsid:organismnames.com:name:1188314 |
...
| †Placenticeras Meek 1870 | urn:lsid:organismnames.com:name:1208685 |
| †Placenticeras | urn:lsid:organismnames.com:name:374872 |
| †Placenticeras Meek 1876 | urn:lsid:organismnames.com:name:1188314 |