Psammechinus is a genus of sea urchins in the family Parechinidae containing two species: Image Scientific name Distribution Psammechinus microtuberculatus (Blainville, 1825) western and eastern Atlantic Ocean, the Adriatic Sea and Aegean Sea Psammechinus miliaris (P.L.S. Müller, 1771) eastern Atlantic Ocean from Scandinavia south to Morocco, but not in the Mediterranean Sea
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