TrapezidaeTrapezidae is a family of bivalves in the order Venerida.GeneraThe following genera are recognised in the family Trapezidae: †Aphaea Dailey & Popenoe, 1966 Coralliophaga Blainville, 1824Fluviolanatus Iredale, 1924Glossocardia Stoliczka, 1870 †Langvophorus Vu Khuc, 1977Neotrapezium Habe, 1951 †Straelenotrapezium Glibert & van de Poel, 1970Trapezium Megerle von Mühlfeld, 1811