| Named By: | Laurie in 1892 |
| Time Period: | Unavailable |
| Location: | Scotland - Downton Sandstone Formation, Fish Bed Formation, Kip Burn Formation, Reservoir Formation, Slot Burn Formation |
| Size: | Unavailable |
| Diet: | Carnivore |
| Fossil(s): | Partial remains of several individuals |
| Classification: | | Arthropoda | Chelicerata | Eurypterida | |
Parastylonurus is a genus of prehistoric eurypterid.