| Synonymous name | : | Ichthyosaurus chiroparamekostinus T. Hawkins | |
Ref: PBDB: 14 Jan 2014. |
| Synonymous name | : | Ichthyosaurus chiropolyostinus T. Hawkins | |
Ref: PBDB: 15 Jan 2014. |
| Synonymous name | : | †Ichthyosaurus fortimanus Owen, 1884 | |
Ref: PBDB: 19 Jan 2019. |
| Synonymous name | : | †Ichthyosaurus intermedius (Conybeare, 1822) | |
Ref: PBDB: 27 Oct 2013. |
| Synonymous name | : | Ichthyosaurus latimanus R. Owen | |
Ref: PBDB: 27 Oct 2013. |
| Synonymous name | : | †Ichthyosaurus polyostinus Hawkins, 1840 | |
Ref: PBDB: 10 Feb 2014. |