Name(s) in cluster
| †Ptychaspis calyce Walcott | urn:lsid:organismnames.com:name:2341390 |
| †Ptychaspis calyce | urn:lsid:organismnames.com:name:3674432 |
| †Ptychaspis calyce Walcott 1905 | urn:lsid:organismnames.com:name:680264 |
...
| †Ptychaspis calyce Walcott | urn:lsid:organismnames.com:name:2341390 |
| †Ptychaspis calyce | urn:lsid:organismnames.com:name:3674432 |
| †Ptychaspis calyce Walcott 1905 | urn:lsid:organismnames.com:name:680264 |