ProsthiostomidaeProsthiostomidae is a family of free-living marine polyclad flatworms in the suborder Cotylea.GeneraEnchiridium Bock, 1913Enterogonimus Hallez, 1913Euprosthiostomum Bock, 1925Lurymare Marcus & Marcus, 1968Prosthiostomum Quatrefage, 1845