| Synonymous name | : | †Amblypeza entellus Hay, 1908 | |
Ref: PBDB: 31 Aug 2018. |
| Synonymous name | : | †Catapleura chelydrina Cope, 1875 | |
Ref: PBDB: 30 Apr 2013. |
| Synonymous name | : | †Osteopygis borealis (Wieland, 1904) | |
Ref: PBDB: 12 Sep 2018. |
| Synonymous name | : | †Osteopygis chelydrinus Cope, 1868 | |
Ref: PBDB: 1 Apr 2015. |
| Synonymous name | : | †Osteopygis erosus Cope, 1875 | |
Ref: PBDB: 20 Oct 2017. |
| Synonymous name | : | †Osteopygis gibbi Wieland, 1904 | |
Ref: PBDB: 12 Sep 2018. |
| Synonymous name | : | †Osteopygis platylomus Cope, 1870 | |
Ref: PBDB: 19 Oct 2017. |
| Synonymous name | : | †Osteopygis robustus Hay, 1908 | |
Ref: PBDB: 20 Mar 2015. |