Name(s) in cluster
| †Protogrammoceras | urn:lsid:organismnames.com:name:419106 |
| †Protogrammoceras Spath 1913 | urn:lsid:organismnames.com:name:1599447 |
| †Protogrammoceras Spath 1914 | urn:lsid:organismnames.com:name:3504955 |
...
| †Protogrammoceras | urn:lsid:organismnames.com:name:419106 |
| †Protogrammoceras Spath 1913 | urn:lsid:organismnames.com:name:1599447 |
| †Protogrammoceras Spath 1914 | urn:lsid:organismnames.com:name:3504955 |