Name(s) in cluster
| †Halkyardia | urn:lsid:organismnames.com:name:1188598 |
| †Halkyardia Halkyard 1919 | urn:lsid:organismnames.com:name:3622622 |
| †Halkyardia Heron-Allen & Earland 1919 | urn:lsid:organismnames.com:name:5243794 |
...
| †Halkyardia | urn:lsid:organismnames.com:name:1188598 |
| †Halkyardia Halkyard 1919 | urn:lsid:organismnames.com:name:3622622 |
| †Halkyardia Heron-Allen & Earland 1919 | urn:lsid:organismnames.com:name:5243794 |