Psammechinus
Psammechinus is a genus of sea urchins in the family Parechinidae containing two species:
| Image | Scientific name | Distribution |
| Psammechinus microtuberculatus | western and eastern Atlantic Ocean, the Adriatic Sea and Aegean Sea | |
| Psammechinus miliaris | eastern Atlantic Ocean from Scandinavia south to Morocco, but not in the Mediterranean Sea |