| Synonymous name | : | †Crassatella lintea (Conrad, 1860) | |
Ref: PBDB: 11 Jul 2021. |
| Synonymous name | : | †Crassatella ripleyana Conrad, 1858 | |
Ref: PBDB: 30 Apr 2013. |
| Synonymous name | : | †Crassatella subplana Conrad, 1853 | |
Ref: PBDB: 30 Apr 2013. |
| Synonymous name | : | †Crassatellites carolinana Stephenson, 1927 | |
Ref: PBDB: 11 Jul 2021. |
| Synonymous name | : | †Uddenia fragilis Harbison, 1945 | |
Ref: PBDB: 11 Jul 2021. |